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From |
"JVerkuilen (Gmail)" <jvverkuilen@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Interpretation of Two-sample t test with equal variances? |

Date |
Wed, 20 Mar 2013 14:53:43 -0400 |

On Wed, Mar 20, 2013 at 10:33 AM, Nick Cox <njcoxstata@gmail.com> wrote: > However, it is also likely that the means are hiding important details > in the distributions. <...> > > Although I have much faith that Student's t test works well even if > you lie to it, skewness sounds like an area for investigation. Agreed. Mean differences may not be all that important. My gut > instinct is that turning the problem round to make it a logit > regression on age makes much more sense. I would use a fractional > polynomial or cubic spline in age and always plot some smooth summary > of one or other fraction (e.g. fraction C or fraction V) versus age. Continuing in my spirit of "me, too!"... very good advice. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Interpretation of Two-sample t test with equal variances?***From:*Gwinyai Masukume <parturitions@gmail.com>

**Re: st: Interpretation of Two-sample t test with equal variances?***From:*Richard Williams <richardwilliams.ndu@gmail.com>

**Re: st: Interpretation of Two-sample t test with equal variances?***From:*Gwinyai Masukume <parturitions@gmail.com>

**Re: st: Interpretation of Two-sample t test with equal variances?***From:*David Hoaglin <dchoaglin@gmail.com>

**Re: st: Interpretation of Two-sample t test with equal variances?***From:*Nick Cox <njcoxstata@gmail.com>

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