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From |
Michael Barnes <michael_barnes_30@hotmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: I have a t-statistic and am looking for the corresponding p-value |

Date |
Wed, 29 Aug 2007 17:59:43 -0700 |

I have a t-statistic, and the number of observations, is it possible to have stata find 1-a/2 (p-value) for me? Just in case that is unclear let me try to clarify...I have an expected value for income Yhat, and I want to know the probability that income is below the poverty level PL (a constant). In order to find this I am going to form a confidence interval with PL being my lower confidence interval limit. In other words, Yhat-[t(1-a/2; n-2)*s{Yhat}]=lower confidence interval limit, or Yhat-[t(1-a/2; n-2)*s{Yhat}]=PL. I know Yhat, s{Yhat}, n-2, and PL, I can therefore solve for t(1-a/2; n-2): t(1-a/2; n-2)=(Yhat-PL)/s{Yhat}. Where 1-a/2 is my p-value, or probability of being past my lower confidence interval limit (in this case the poverty level). Assume n=20 and I solved for the t-statistic and get 2.1...I then have 2.1=t(1-a/2; 18). Is there any way of telling Stata that I want the p-value given a t-statistic of 2.1, and n-2=18? In this case, the p-value would be: 0.025, or 2.5%. I would appreciate any insights! Thanks, Mike _________________________________________________________________ Messenger Café — open for fun 24/7. Hot games, cool activities served daily. Visit now. http://cafemessenger.com?ocid=TXT_TAGHM_AugHMtagline * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: I have a t-statistic and am looking for the corresponding p-value***From:*Philip Ryan <philip.ryan@adelaide.edu.au>

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