On 11/9/2005 10:01 PM, Adaikalavan Ramasamy wrote: > I think an alternative is to use a p-value from F distribution. Even > tough it is not a statistics, it is much easier to explain and popular > than 1/F. Better yet to report the confidence intervals.
Just curious about your usage: why do you say a p-value is not a statistic? Duncan Murdoch > > Regards, Adai > > > > On Wed, 2005-11-09 at 17:09 -0600, Mike Miller wrote: > >>On Wed, 9 Nov 2005, Gao Fay wrote: >> >> >>>Hi there, >>> >>>Suppose mu is constant, and error is normally distributed with mean 0 and >>>fixed variance s. I need to find a statistics that: >>>Y_i = mu + beta1* I1_i beta2*I2_i + beta3*I1_i*I2_i + +error, where I_i is 1 >>>Y_i is from group A, and 0 if Y_i is from group B. >>> >>>It is large when beta1=beta2=0 >>>It is small when beta1 and/or beta2 is not equal to 0 >>> >>>How can I find it by R? Thank you very much for your time. >> >> >>That's a funny question. Usually we want a statistic that is small when >>beta1=beta2=0 and large otherwise. >> >>Why not compute the usual F statistic for the null beta1=beta2=0 and then >>use 1/F as your statistic? >> >>Mike >> >>______________________________________________ >>R-help@stat.math.ethz.ch mailing list >>https://stat.ethz.ch/mailman/listinfo/r-help >>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html >> > > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html