when does t-tests fail why do we need to test the same test for different conditions? types of test condition how to test performance of a group what is test for two conditions of a t-test why can i run multiple t tests of different conditions which conditions can be tested twice? when to test performance of different groups of data? why test for different conditions why test different conditions why is d test used when a group is tested twice before a t test? why type i error in multipe testing why is c vs d error a t test? when to test different conditions is it okay to run multiple t tests for different groups of data how to test the difference a b c d how to test performance of multiple experiments why would you do a multipe test can a condition be tested multiple times in same experiment why do I run t tests of multiple groups of data