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From | "Nick Cox" <n.j.cox@durham.ac.uk> |
To | <statalist@hsphsun2.harvard.edu> |
Subject | st: RE: what's the big T in the t-test results |
Date | Tue, 15 Jun 2010 21:17:11 +0100 |
T is the random variable of which t is the sample realisation. Alternatively, Student's t test is for determining whether a lady can distinguish between two sets of cups of tea in which milk is poured before or after the tea. (Garbled history of statistics.) (If no ladies are available, use students instead.) Nick n.j.cox@durham.ac.uk Airey, David C What are the capital Ts in the results printed out after using ttest, e.g., Pr(T < t), Pr(|T| > |t|), or Pr(T > t) for the one-tailed and two-tailed HAs? I interpret the p values as the probability that the sample mean came from the null sampling distribution, but what is the English for Pr(T > t)? * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/