in what way are the Q values (critical) and t ... connected? someone pointed out that Q = t * sqrt 2 ... for example, doing a tukey follow up test ... with 3 means and 27 df for mserror ... the critical (.95 one tail) value for Q is about 3.51 (note: the mtb output shows this cv of 3.51)
now, that means that t * sqrt 2 = 3.51 ... or, t will equal about 2.48 in this case in minitab, doing a onew anova ... or glm ... with tukey as the paired comparison method ... the 95% CI for the paired difference in means (for the problem i was working with) did go from (mean difference) +/- 2.48 * stan error of the difference my question is ... how would we go to the standard t table ... and find a t value like 2.48 in a situation with the df value we have above ... 27 ... or knowing that we have 3 means to compare? that is ... how would someone know how to construct this 95% CI ... that mtb prints out when doing tukey follow up tests? ... _________________________________________________________ dennis roberts, educational psychology, penn state university 208 cedar, AC 8148632401, mailto:[EMAIL PROTECTED] http://roberts.ed.psu.edu/users/droberts/drober~1.htm ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================
