Design of Experiments

  • I am addicted to placebos. I could quit, but it wouldn't matter. A quote of American stand-up comedian, painter, author, and actor Steven Wright (1955 - ).

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  • This page helps readers know which statistcal tests are appropriate for the different types of data. Two charts display the information. A discussion of study design and sample size, as well as exercise questions with solutions are also provided.
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  • This textbook for medical statistics covers many topics such as: Data display and summary; Mean and standard deviation; Populations and samples; Statements of probability and confidence intervals; Differences between means: type I and type II errors and power; Differences between percentages and paired alternatives; The t tests; The chi-squared tests; Exact probabilty test; Rank score tests; Correlation and regression; Survival analysis; Study design and choosing a statistical test.
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  • This lesson poses a series of questions designed to challenge students' possible misconceptions of statistical inference and hypothesis testing. The lesson uses the statistical software, Fathom, and three datasets with information on the number of chips per canister distributed by a snack maker. The data can found at the relation address below.
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  • While nothing is more uncertain than the duration of a single life, nothing is more certain than the average duration of a thousand lives. A quote of American actuary and abolitionist Elizur Wright (1804 - 1885).
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  • A statistician's wife had twins. He was delighted. He rang the minister who was also delighted. "Bring them to church on Sunday and we'll baptize them," said the minister. "No," replied the statistician. "Baptize one. We'll keep the other as a control." This is joke number 30 on Gary Ramseyer's First Internet Gallery of Statistics Jokes at http://www.ilstu.edu/~gcramsey/Gallery.html
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  • This site presents may articles on current events and issues that challenge statistics reported in the news. Each article encourages readers to think critically about statistics reported by the media and to look at the whole picture before believing conclusions presented in the news. "Our goals are to correct scientific misinformation in the media resulting from bad science, politics, or a simple lack of information or knowledge."
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  • This applet displays various distributions and allows the user to experiment with the parameters to see the effects on the curve.

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  • My life is an experiment I never had a chance to properly design. The quote is from American statistical consultant Diana Ballard and is also referenced as joke #74 on Gary Remseyer's First Internet Gallery of Statistics Jokes
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  • A quick pun about modeling and examining lack of fit by Bruce White
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