Hello everyone, I tried to use the ttest procedure while using the WEIGHT option. In the output I got, there was only t-test for the 'equal variances' case. When I tried to use the COCHRAN option to get the t-test for unequal variances I got a warning message: 'WARNING: The COCHRAN option is ignored when using WEIGHT statement'. I should note that when I don't weight the cases I receive all of the relevant t-test: t-test for equal variances (pooled), t-test for unequal variances (Satterthwaite) and t-test for unequal variances (Cochran). Is anyone familiar with this problem? How can I weight my cases but still get the unequal variances t-test in the output (as some of the Levin tests indicate that I should reject the equal variances null assumption). Thanks!
... View more