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  • Quote: Gibbon on Probability

    This day may possibly be my last: but the laws of probability, so true in general, so fallacious in particular, still allow about fifteen years. A quote of English historian Edward Gibbon (1737 - 1794). The quote was written in 1787 and was published after his death in "Miscellaneous works of Edward Gibbon, with memoirs of his life and writings composed by himself" edited by Lord John Seffield, 1796

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  • Dataset Example: Student's T

    This resource explains the t-distribution and hypothesis testing (informally) using an example on laptop quality.

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  • Sample Sizes

    This resource discusses sample sizes and how they are chosen.

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  • Margin of Error

    This resource explains margin of error using an example on presidential popularity polls.

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  • Per Capita

    This resource defines and explains per capita rates using an example on city murder rates.

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  • Percent Change

    This resource defines and explains percent changes using an example on city murder rates.

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  • Median

    This resource defines and explains the median using an example on employee salaries.

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  • Mean

    This resource defines and explains the arithmetic mean using an example on employee salaries.

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  • **Statistics Every Writer Should Know

    This site provides an introduction to basic statistical concepts for journalists and writers with little math background. Key Words: Mean; Median; Percent Changes; Per capita; Rates; Standard Deviation; Normal Distribution; Margin of Error; Confidence Interval; Data Analysis; Sample Sizes; Statistical Tests; Student's T.

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  • Dataset: Elderly vs. Young Comparison

    This dataset comes from two studies, one of 16 healthy young subjects and another of 14 healthy elderly subjects, each given a drug in two treatment periods. Blood samples were taken, and plasma levels were recorded. Questions from this study refer to whether age or gender affects plasma level. A text file version of the data is found in the relation link.

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