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From |
"Carlo Lazzaro" <carlo.lazzaro@tin.it> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: R: t-test using analytic weights |

Date |
Tue, 10 Nov 2009 16:23:44 +0100 |

Dear Sripal, As far as my previous example is concerned, the following line is redundant: oneway age Group [aweight = height], bonferroni. BTW, Bonferroni correction (just like other corrections for multiple comparisons available for -ANOVA-) is actually useful for comparing the means of three or more Groups. Hence, for two Groups only (as your reported) the revised example goes like this(flag: Stata 9.2/SE): ------------------------------------------------- set obs 100 g Group=1 in 1/50 replace Group=2 in 51/100 g age = 50 *uniform() g height=165*uniform() oneway age Group [aweight = height] ------------------------------------------------- Should you be interested in comparing the means of three or more Groups, you can replace the line oneway age Group [aweight = height] with the line oneway age Group [aweight = height], bonferroni Kind Regards, Carlo -----Messaggio originale----- Da: Carlo Lazzaro [mailto:carlo.lazzaro@tin.it] Inviato: martedì 10 novembre 2009 16.08 A: 'statalist@hsphsun2.harvard.edu' Cc: 'Sripal Kumar' Oggetto: R: t-test using analytic weights Sripal might want to take a look at: -help ANOVA-; the following example (flag: Stata 9.2/SE): ------------------------------------------------- set obs 100 g Group=1 in 1/50 replace Group=2 in 51/100 g age = 50 *uniform() g height=165*uniform() oneway age Group [aweight = height] oneway age Group [aweight = height], bonferroni ----------------------------------------------- HTH and Kind Regards, Carlo -----Messaggio originale----- Da: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] Per conto di Sripal Kumar Inviato: martedì 10 novembre 2009 15.14 A: statalist Oggetto: st: t-test using analytic weights Hi, I am trying to use t-test of independent samples but by using analytic weights. I tried the following: ttest age1 == age2 [aweight = wt], unpaired I get an error message saying "weights not allowed". Is there a way around it? thanks, Sripal. * * 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/ * * 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/

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