what is the difference between a t test and a p test? how is the difference between the three groups how do you test the arithmetic of three groups how to compare means of three different groups? how do you compare three groups how to compare mean between three groups how to test for statistical differences between different groups how to compare mean to mean how to compare means between groups which type of test is used to compare the mean and means of three groups of individuals? how do you compare the mean between three groups? how do you compare the means of three groups how to check the differences between two groups compare t ttest what test do i use to compare the mean of three groups when comparing the means of three groups, you do what how to compare means of three groups compare different mean between different groups how do i test a statistical comparison what type of tests to compare two groups and three groups