Statistics

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The statistics portal is a central place for everything related to statistical analysis in biological research. As a central starting point it might provide links to pages discussing individual statistical topics in detail as well as listing useful software and recommended external web pages. Help it grow by contributing content.
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Topics

 * representing data numerically
 * representing data graphically
 * significance tests
 * significance levels
 * guide to Excel for statistics
 * Logistic function
 * Log-normal distribution
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Software

 * guide to statistics software
 * R Statistics
 * SPSS, SAS
 * Microsoft's Excel and OpenOffice's Calc are of limited use for statistical analysis
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Background reading from the Wikipedia

 * biostatistics
 * measures of central tendency: mean, median, mode
 * normal distributions: normal distribution, standard deviation, variance, standard error of the mean from the Wikipedia
 * significance tests: significance, confidence interval, t test, ANOVA, margin of error, Polls and margin of error
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Forums

 * Bioinformatics & biostatistics subforum at protocol-online.org. This subforum is mostly bioinformatics with only some statistics threads. The forum is very active with over 20k registered members and usually >200 users online.
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Tutorials

 * The really easy statistics site by Jim Deacon, Uni of Edinburgh - great starting point
 * BMJ Statistics Notes series - very accessible article series on statistics in medicine
 * Intuitive Biostatistics, chapter 37: Choosing a statistical test and chapter 12: Interpreting nonsignificant p values from the site of the GraphPad software

Online books

 * HyperStat statistics textbook by David Lane (prof. for psychology & statistics)
 * The Little Handbook of Statistical Practice by Gerard E. Dallal (chief of the Biostatistics Unit, Tufts Uni)
 * Electronic Statistics Textbook by StatSoft
 * Visual Statistics Book by Cruise Scientific


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Quotes
Facts are stubborn things, but statistics are more pliable.
 * Mark Twain (1835 - 1910)

Statistics: The only science that enables different experts using the same figures to draw different conclusions.
 * Evan Esar (1899 - 1995)

I gather, young man, that you wish to be a Member of Parliament. The first lesson that you must learn is, when I call for statistics about the rate of infant mortality, what I want is proof that fewer babies died when I was Prime Minister than when anyone else was Prime Minister. That is a political statistic.
 * Sir Winston Churchill (1874 - 1965)

Smoking is one of the leading causes of statistics.
 * Fletcher Knebel

There are three kinds of lies: lies, damned lies, and statistics.
 * Benjamin Disraeli (1804 - 1881)


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