What is *How to Lie with Statistics* by Darrell Huff about?

*How to Lie with Statistics* (1954) exposes common tactics used to manipulate data in media, advertising, and research. Darrell Huff explains how distorted graphs, biased sampling, and misleading averages deceive audiences, emphasizing that statistics often reflect the biases of their creators. The book remains a foundational guide for recognizing statistical deception in everyday life.

Who should read *How to Lie with Statistics*?

This book is ideal for general readers seeking to improve data literacy, professionals in journalism or marketing, and students learning statistical analysis. It’s particularly valuable for anyone navigating data-driven decision-making or aiming to spot misleading claims in news, ads, or research.

Is *How to Lie with Statistics* worth reading in 2025?

Yes. Despite its 1954 publication, the book’s insights into data manipulation remain relevant in today’s era of big data and AI. Its examples of graphical misrepresentation and survivorship bias mirror modern issues like social media metrics and algorithmic bias.

What are key concepts in *How to Lie with Statistics*?

Key concepts include: - **Misleading graphs**: Truncated axes exaggerate trends. - **Selection bias**: Samples skewed to favor desired outcomes. - **Semi-attached figures**: Linking unrelated data to imply causation. - **Survivorship bias**: Overlooking failures in datasets.

How does Darrell Huff explain the “semi-attached figure”?

Huff describes “semi-attached figures” as statistics that appear connected but lack causal proof. For example, linking alcohol consumption to lung cancer without accounting for smoking. This tactic diverts attention from missing variables to support biased conclusions.

What criticisms exist about *How to Lie with Statistics*?

Critics note the book oversimplifies statistical methods and focuses more on intent than systemic incompetence. Some argue it lacks depth for readers with formal training, but its accessibility makes it a timeless primer for casual audiences.

How can *How to Lie with Statistics* help improve media literacy?

The book teaches readers to interrogate data sources, check for omitted context, and scrutinize graphical presentations. For example, Huff highlights how non-zero axes in charts distort perceived growth, a tactic still used in financial and political reporting.

What famous quote summarizes *How to Lie with Statistics*?

“Averages and relationships and trends and graphs are not always what they seem.” This line underscores Huff’s thesis that statistical language can sensationalize, confuse, or oversimplify reality without outright lying.

How to lie with statistics

Darrell Huff

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Overview of How to lie with statistics

Discover why this 1954 classic - with over 1.5 million copies sold - remains required reading in statistics courses worldwide. Huff's witty expose reveals how numbers manipulate us daily. Bill Gates's recommended read for navigating today's misinformation landscape.

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Chapter 1

Numbers That Lie, Truths That Bind

In a world drowning in data, few books have remained as relevant as "How to Lie with Statistics." When Darrell Huff first published this slim volume in 1954, he could hardly have imagined that nearly seven decades later, his work would be recommended reading by Bill Gates and remain a staple in journalism schools and statistics courses worldwide. The book has sold over 1.5 million copies and been translated into more than 22 languages, making it the best-selling statistics book in history. What makes this remarkable is that Huff wasn't a statistician at all-he was a journalist and editor who recognized how easily numbers could be manipulated to tell whatever story their presenter desired. The book's enduring appeal stems from its accessible approach to a complex subject. Rather than teaching readers how to deceive (despite its provocative title), it equips them with the critical thinking skills needed to spot statistical manipulation in advertising, news, and research. In our era of information overload, viral misinformation, and data-driven decision making, Huff's insights aren't just relevant-they're essential intellectual self-defense.

Chapter 2

The Sampling Shell Game

Have you ever wondered why so many surveys seem to contradict each other? The answer often lies in biased sampling-a fundamental flaw that can render even the most impressive-looking statistics meaningless. Consider the case of Yale graduates' income statistics. When Yale surveyed its alumni about their earnings, the results painted a picture of extraordinary financial success. But this rosy image concealed multiple sampling biases. The "address unknown" alumni weren't typically wealthy executives (whose addresses are easily tracked) but rather lower-earning individuals who couldn't afford class reunions or regular alumni contributions. Those who discarded the questionnaires were likely not eager to report modest incomes. The resulting figure represented not the typical Yale graduate but a self-selected group of successful ones willing to share their financial achievements. This problem isn't unique to academic institutions. Market research on magazine readership once showed people claiming to read Harper's while avoiding True Story-directly contradicting actual circulation figures. Why? Because respondents wanted to appear cultured and intellectual. Similarly, self-reported tooth-brushing statistics invariably show higher frequencies than actual behavior would support. We lie to researchers, and sometimes to ourselves. A proper sample must be representative-free from built-in bias. Yet achieving this ideal proves remarkably difficult. The Connecticut Tumor Registry once claimed impressive improvements in cancer survival rates, but their data couldn't track patients who had left the state-quite possibly those whose conditions had worsened. A psychiatrist's claim that "practically everybody is neurotic" came from studying only his patients, not the general population-like concluding most people are sick by studying hospital admissions. Even attempts at random sampling face significant challenges. The Literary Digest's infamous 1936 election prediction failure stemmed from sampling telephone and automobile owners who skewed Republican during the Depression era. Modern polling introduces multiple biases: interviewers tend to approach better-dressed, more conventional-looking subjects; respondents often give pleasing rather than truthful answers; and certain demographics are systematically underrepresented. The next time you encounter a statistic based on a survey or sample, ask yourself: Who wasn't counted? Who declined to respond? What might motivate people to participate or not? The answers often reveal more than the statistic itself.

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Chapter 3

Average Deception: Mean, Median, and Manipulation

"The average American family has 2.5 children." We've all heard statements like this, but what does "average" actually mean? This seemingly simple concept hides tremendous potential for manipulation and misunderstanding, affecting everything from public policy to personal financial decisions. Imagine I'm selling houses in a neighborhood. I could truthfully tell a potential homebuyer that the "average" neighborhood income is $15,000 to attract their interest, suggesting prosperity and stability. Later, when arguing against tax increases at a city council meeting, I might claim the "average" is only $3,500 to paint a picture of economic hardship. Both figures could represent the same population using different types of averages-mean, median, or mode-each calculated legitimately but telling dramatically different stories about the same community's economic health. With income figures, the mean (arithmetic average) can be dramatically higher than the median (middle value) when distribution is skewed by a few wealthy individuals. Consider a neighborhood of 100 households where most residents are farmers, wage earners, or pensioners making $30,000-40,000 annually, but three are millionaires earning $2 million each. The mean income would be roughly $90,000, while the median might be $35,000. Nearly 97% of residents would fall below the "average" income. This isn't just a theoretical concern-it's how company executives can report impressive "average" employee salaries while most workers remain underpaid. Tech companies, for instance, often boast about mean salaries inflated by high-earning software engineers while masking the lower wages of support staff. Even seemingly precise figures like "average American family income of $3,100 in 1949" require extensive context about what "family" means and which average was used. Does "family" include single people living alone? Does it count only those with incomes? Are teenagers with part-time jobs included? Do we factor in non-cash benefits or only wages? Without these details, the number floats in a vacuum of meaning, making historical comparisons particularly treacherous. The choice of average isn't a technical footnote-it's often the entire story. When reporting salaries to potential recruits, businesses typically use the mean to impress with high "average" figures. When discussing taxes or social needs, they might switch to the median or mode to suggest lower typical incomes. Universities might highlight mean graduate salaries when recruiting but use median figures when discussing student loan affordability. Real estate agents might emphasize mean home prices in booming markets but switch to medians during downturns. Think critically about this the next time you hear about "average" home prices, test scores, or incomes. Which average is being used? Who benefits from that particular choice? Is it the mean, artificially pulled up by extreme values? The median, hiding variation at both ends? Or the mode, potentially obscuring important trends? The answers might surprise you-and completely change your understanding of the information being presented. Remember that behind every average lies a distribution, and understanding that distribution is often more valuable than the average itself.

Chapter 4

The Missing Pieces: What They Don't Tell You

Have you ever noticed how advertisements make claims like "kills 99% of germs" without mentioning which germs, under what conditions, or whether those particular germs actually cause illness? The strategic omission of crucial information is perhaps the most common form of statistical deception. One critical missing piece is often the "test of significance"-the figure that shows how reliable results actually are. This significance level, expressed as probability, tells you whether results represent real differences or mere chance variations. For most scientific purposes, a five percent level (19 chances out of 20) is considered minimum reliability, while one percent (99 chances out of 100) approaches certainty. Without this information, you can't tell if a reported difference is meaningful or just statistical noise. Another frequently omitted detail is the range or deviation from averages. American housing has historically been wastefully designed for the mythical "average family" of 3.6 persons, ignoring that this represents fewer than half of all households. Parents worry needlessly when children don't match developmental "norms," not realizing these averages come with wide normal variations. The confusion of "normal" (common) with "desirable" caused much criticism of Kinsey's sexual behavior research, which simply reported what people actually did rather than what they should do. Deceptive advertising thrives on these omissions. From vague claims about steel hardening to electric companies boasting power is "available" to farms without specifying how many actually have it, missing figures transform meaningless data into compelling sales pitches. Growth charts promising to predict children's adult height and cereal boxes showing "energy release" graphs rely on statistical tripe with crucial numbers conveniently absent. Even respected publications aren't immune. Fortune magazine has run charts with impressive upward trends but no scale numbers, rendering them meaningless. Without range information, temperature averages can hide extreme variations, like Oklahoma City's comfortable-sounding 60.2 mean annual temperature that conceals a brutal 130-degree annual range. The next time you encounter a statistic, ask what information might be missing. Are you seeing the complete picture, or just the parts someone wants you to see? The empty spaces in data often tell a more important story than the numbers themselves.

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Chapter 5

Mountains from Molehills: Meaningless Differences

"My child's IQ is 101, but his friend's is only 98." How many parents have worried about such small differences, assuming they represent meaningful distinctions in intelligence? This common misunderstanding reveals how we often attribute significance to statistically meaningless variations, leading to unnecessary anxiety and potentially harmful decision-making. Intelligence tests produce numbers that seem precise but hide significant margins of error. When parents learn their children's IQs, they often make distinctions between scores like 98 and 101, assuming one child is "below average" and one "above average." This creates artificial hierarchies and can affect everything from educational opportunities to parental expectations. Consider a classroom where children are grouped by IQ scores that differ by just 2-3 points - this practice ignores both statistical reality and educational best practices. First, IQ tests measure only limited aspects of intelligence, neglecting leadership, creativity, social judgment, artistic aptitudes, and emotional balance. A child scoring 98 might excel in creative problem-solving or demonstrate exceptional emotional intelligence - qualities that traditional IQ tests fail to capture. Consider famous innovators like Thomas Edison or Walt Disney, whose contributions to society weren't predicted by conventional intelligence measures. Second and more importantly, these tests have statistical errors that render small differences meaningless. The Stanford-Binet test has a probable error of three percent, meaning a score of 98 should properly be expressed as 98 3 and 101 as 101 3. These ranges overlap substantially, making the scores effectively identical. The only meaningful way to think about IQs is in broader ranges-"normal" being 90 to 110-not as precise numbers. This range encompasses about 50% of the population, highlighting how arbitrary fine distinctions can be. This error applies to all sampling studies. Magazine editors often make foolish decisions based on small readership differences (like 35% vs. 40%) that may be statistically meaningless due to sample size limitations. For instance, a magazine might completely overhaul its content strategy based on a 5% difference in reader engagement, potentially alienating loyal readers for what amounts to statistical noise. The most egregious example was Old Gold cigarettes, which capitalized on being listed last in a Reader's Digest study showing all cigarette brands had virtually identical harmful substances. They advertised being "lowest in nicotine" while omitting that the differences were negligible and well within the margin of error - a difference of mere hundredths of a percentage point. We see this phenomenon everywhere: small differences in unemployment rates between months (like 5.1% vs. 5.2%), minor variations in crime statistics between cities (such as a 0.5% difference in property crime rates), or slight changes in consumer confidence indexes (moving from 96.3 to 96.8). Often these differences are statistically insignificant-random fluctuations rather than meaningful trends-yet they generate headlines and policy decisions as if they represented substantial changes. Political campaigns frequently exploit such minor variations, claiming credit for small positive changes or criticizing opponents for equally insignificant negative ones. When examining statistics, always ask whether the differences being highlighted are large enough to matter. Consider the practical significance: Would a 0.1% difference in unemployment actually affect the economy? Does a 2-point IQ difference predict any real-world outcomes? Small variations often tell us nothing except that the world contains natural randomness and measurement error. Not every difference is a distinction, and not every change is a trend. Understanding this principle can lead to more rational decision-making and less anxiety about minor variations in measured outcomes.

Chapter 6

Visual Lies: How Graphs Distort Reality

A picture is worth a thousand words-and when it comes to statistical deception, a misleading graph can override thousands of accurate data points. Visual representations have unique power to shape our understanding, which makes their manipulation particularly effective. The simplest line graph honestly shows trends when properly constructed with a zero baseline. But by chopping off the bottom portion (truncating), a modest 10% rise in national income can appear dramatic. Even more deceptive is changing the proportion between vertical and horizontal axes to create steeper slopes that suggest rapid change where little exists. These aren't isolated tricks. Newsweek once used truncation to dramatize stock prices hitting a "21-Year High," making modest gains look revolutionary. Columbia Gas manipulated charts to make a 4% price decrease look like 33%. Steel companies deployed similar tactics against wage increases. As far back as 1938, Dun's Review exposed an advertisement that made a 4% government payroll increase appear to exceed 400%. Beyond simple line graphs, pictorial representations offer even more creative deception opportunities. The American Iron and Steel Institute once used blast furnaces to show capacity increases between decades-drawing one furnace just over two-thirds as tall as another to represent a modest 1.5:1 ratio. Since the volume of three-dimensional objects increases with the cube of their linear dimensions, this created a visual impression suggesting a 3:1 difference. The wider second furnace and elongated black bar further distorted the comparison, transforming a 50% increase into something that visually suggested a 1500% difference. Similar tricks appeared in Newsweek's representation of life expectancy gains, where a figure twice as tall as another created an eightfold visual exaggeration due to the three-dimensional representation. Other misleading techniques include "The Crescive Cow," where showing cow population growth with differently sized animals might suggest the cows themselves have grown larger, and "The Diminishing Rhinoceros," which applies the same deceptive technique to rhinoceros population decline. Next time you see a graph or chart, examine it critically. Does it start at zero? Are the proportions reasonable? If it uses images rather than simple bars or lines, do the visual dimensions accurately reflect the numerical differences? The most convincing statistical lies often come not in numbers but in pictures designed to bypass our critical thinking.

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Chapter 7

False Equivalence: The Art of Changing the Subject

When you can't prove what you want, demonstrate something else and pretend they're the same thing. This technique-the "semiattached figure"-might be the most pervasive form of statistical deception because it's so difficult to detect. Consider antiseptic advertisements claiming to kill millions of germs in laboratory tests. The statement may be technically true but irrelevant to actual cold prevention. Similarly, when a juicer claims to extract "26% more juice," the comparison might be against an obsolete hand reamer rather than competitive modern juicers. The figures aren't necessarily false-they're just answering different questions than the ones consumers are actually asking. Opinion polls frequently employ this technique. Princeton researchers once discovered that people most prejudiced against blacks were most likely to answer that blacks had equal job opportunities. Thus, a poll showing "improving conditions" might actually indicate increasing prejudice rather than real progress. Similarly, claims that "27% of eminent physicians smoke Throaties" suggest medical authority without relevance to health benefits. Transportation statistics are particularly susceptible to this manipulation. More airplane deaths occur now than in 1910 simply because more people fly, not because planes are less safe. Railroad fatality figures often include automobile-train collisions, which say more about driver behavior than rail safety. Meaningful risk assessment requires passenger-mile rates, not raw numbers-yet the latter are frequently cited because they're more dramatic. Financial reporting employs similar tricks. Corporate profits might be hidden in depreciation accounts or expressed as percentages of sales rather than investment, making mediocre returns look impressive. Even medical statistics suffer from inconsistent reporting, with apparent geographic disease patterns reflecting different reporting requirements rather than actual prevalence. Malaria figures in the American South dropped dramatically not because the disease was cured, but because the term was redefined from a colloquialism for any fever or chill to only confirmed cases. Perhaps the most common form of this deception occurs in comparing incomparable populations. Navy death rates once appeared lower than civilian rates simply because the populations weren't comparable-the Navy consisted of young, healthy men while civilian populations included vulnerable infants and elderly people. Without adjusting for age distribution, such comparisons are meaningless yet frequently presented as significant. The next time you encounter a statistic, ask whether it's actually addressing the question at hand or cleverly answering a different one. Often, the most misleading figures are technically accurate but fundamentally irrelevant.

Chapter 8

Correlation, Causation, and Confusion

Does ice cream cause polio? In the early 20th century, some people thought so because polio cases peaked during summer months when ice cream consumption was highest. This classic example illustrates one of the most persistent statistical fallacies: assuming that correlation implies causation. The Latin phrase "post hoc, ergo propter hoc" (after this, therefore because of this) names this error. We observe B following A and conclude A must have caused B, ignoring countless other possibilities. This fallacy pervades statistical interpretation in ways both obvious and subtle. Consider the correlation between milk consumption and cancer rates. Cancer rates are higher in milk-drinking Switzerland than Ceylon, and higher among English women than Japanese women. Does milk cause cancer? The correlation ignores a crucial factor: cancer predominantly strikes in middle and later life, and Swiss and English populations simply live longer than their counterparts. The apparent milk-cancer connection disappears when controlling for age. Professor Helen Walker's example further demonstrates this error: older women tend to toe out more when walking not because aging causes this stance, but because they grew up when young ladies were taught to walk that way, while younger women were taught different posture. The timing creates an illusion of causation where none exists. Many correlations simply reflect general trends of modernization. In contemporary society, you can show positive correlations between seemingly unrelated factors like college enrollment, mental institution populations, cigarette consumption, and heart disease rates. All have increased over time, but that doesn't mean any causes the others. The New Hebrides people's belief that body lice produce good health demonstrates this confusion perfectly. They accurately observed that healthy people had lice while sick people often didn't, but reversed the causation. In reality, fevers made bodies too hot for lice to inhabit, so the lice left sick people-not the other way around. This fallacy isn't just an academic concern. It drives real-world decisions about health, economics, and public policy. When we attribute economic growth to a particular policy, crime reduction to a specific policing strategy, or health improvements to a certain intervention, we're often falling into this same trap-confusing correlation with causation. The next time you hear that A causes B because they happen together, ask what other explanations might exist. Are both caused by factor C? Is the relationship reversed, with B actually causing A? Or is the correlation merely coincidental? These questions might save you from embracing false conclusions based on statistical coincidence.

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Chapter 9

Defending Yourself: How to Question Statistics

Rather than merely learning how to deceive with statistics, we need practical tools for evaluating the numbers that bombard us daily. Five simple questions can help separate statistical sense from nonsense. First, who says so? Examine the source for potential bias. Organizations with something to prove-laboratories seeking to validate theories, newspapers chasing stories, or businesses with financial stakes in outcomes-deserve particular scrutiny. Watch for conscious bias through direct misstatements, ambiguous claims, selective data presentation, shifting measurement units, or inappropriate averages. Even more dangerous is unconscious bias, like the economic optimism that overlooked warning signs before the 1929 crash. Be wary of "O.K. names"-respected institutions whose authority may be implied rather than actual. When Cornell University data was used to "prove" higher education jeopardizes women's marriage prospects, the conclusions were the writer's, not Cornell's. Second, how does he know? Consider the methodology behind the statistic. The Chicago Journal of Commerce once claimed businesses weren't price gouging after the Korean War, based on responses from only 14% of companies contacted-with 86% choosing not to publicly address questions about hoarding or price gouging. Watch for biased samples that have selected themselves. Ask whether the sample is large enough to permit reliable conclusions, and whether correlations are significant. While casual readers can't apply formal tests of significance, often a good long look will reveal there simply weren't enough cases to convince any reasoning person of anything. Third, what's missing? Absent information can render statistics meaningless. Watch for averages without specifying type, figures without comparisons, and percentages without raw numbers. When Johns Hopkins first admitted women, someone reported that "3313% of women had married faculty members"-shocking until you learn there were only three women enrolled. Similarly misleading was a corporation's claim that its 3,003 stockholders averaged 660 shares each, concealing that three men owned three-quarters of all shares. Fourth, did somebody change the subject? Watch for switches between raw figures and conclusions. More reported cases of a disease aren't necessarily more actual cases-as with California's 1952 encephalitis "epidemic" where better detection found mild cases previously missed. Census figures can be skewed by changing definitions (like the "back-to-farm movement" caused by redefining what counts as a farm) or by people's motivations (as when Chinese "population" jumped from 28 to 105 million when counting shifted from tax purposes to famine relief). Finally, does it make sense? This ultimate test asks whether a statistic is logically plausible despite its numerical facade. The Rudolf Flesch readability formula, which claims to measure text difficulty based on word and sentence length, fails this test when applied to literature-showing "The Legend of Sleepy Hollow" harder to read than Plato's Republic. Many statistics collapse under scrutiny: a urologist's claim of 8 million prostate cancer cases (which would mean 1.1 cancerous prostates per susceptible male), or the misuse of life expectancy figures to argue against Social Security. Extrapolation creates particularly absurd results, as when 1950s television growth rates, if continued, would predict forty sets per family within years. Even experts fail spectacularly at prediction-1938 government researchers doubted America would reach 140 million people, while Lincoln's extrapolations predicted over 251 million by 1930. As Mark Twain quipped about the Mississippi River's changing length: "One gets such wholesale returns of conjecture out of such a trifling investment of fact." By applying these five questions to the statistics we encounter, we can avoid being misled by impressive-looking numbers that ultimately signify nothing.

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Key Themes in How to lie with statistics

statistical manipulation
data visualization bias
sampling error
misleading infographics
logical fallacies

Quotes from How to lie with statistics

The semiattached figure is another of the ways to lie with statistics.
If you can't prove what you want to prove, demonstrate something else and pretend that they are the same thing.
We lie to researchers, and sometimes to ourselves.
The choice of average isn't a technical footnote-it's often the entire story.

Characters in How to lie with statistics

Darrell HuffAuthor and journalist who wrote the book

About the Author

Darrell Huff (1913–2001), author of the groundbreaking bestseller How to Lie with Statistics, pioneered accessible explanations of statistical manipulation for general audiences.

An Iowa-born University of Iowa graduate, Huff honed his communication skills as editor of Better Homes and Gardens and Look magazine before becoming a full-time writer. His expertise in distilling complex concepts into engaging prose shines in this seminal work, which blends witty examples with critical analyses of misleading graphs, sampling biases, and data cherry-picking.

Huff’s 1954 classic—part statistical primer, part media literacy guide—remains required reading in academic and professional circles worldwide. While best known for this iconic text, he also authored Cycles in Your Life and contributed to household project guides, showcasing his versatility.

How to Lie with Statistics has sold millions of copies, been translated into over 22 languages, and continues to empower readers to navigate an increasingly data-driven world with healthy skepticism.

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"Reading used to feel like a chore. Now it’s just part of my lifestyle."

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Chapter 5

How to lie with statistics

OverviewOverview of How to lie with statistics

One book. Many ways to hear it.

Numbers That Lie, Truths That Bind

The Sampling Shell Game

See every word as you hear it

Average Deception: Mean, Median, and Manipulation

The Missing Pieces: What They Don't Tell You

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Mountains from Molehills: Meaningless Differences

Visual Lies: How Graphs Distort Reality

See every word as you hear it

False Equivalence: The Art of Changing the Subject

Correlation, Causation, and Confusion

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Defending Yourself: How to Question Statistics

You made it to the end of How to lie with statistics

Key Themes in How to lie with statistics

Quotes from How to lie with statistics

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About the Author

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1,000,000+ curious minds.

1,000,000+ curious minds.

One book. Many ways to hear it.

Numbers That Lie, Truths That Bind

The Sampling Shell Game

See every word as you hear it

Average Deception: Mean, Median, and Manipulation

The Missing Pieces: What They Don't Tell You

Get more out of How to lie with statistics

Mountains from Molehills: Meaningless Differences

Visual Lies: How Graphs Distort Reality

See every word as you hear it

False Equivalence: The Art of Changing the Subject

Correlation, Causation, and Confusion

Get more out of How to lie with statistics

Defending Yourself: How to Question Statistics

You made it to the end of How to lie with statistics

Users also liked

Discover more

Overview of How to lie with statistics