what is the average difference between two groups of participants at a school? what is the sample size for calculating the power of a p value? how many groups should the test be to see the percentage of difference? how to calculate sample size for comparing multiple schools how to determine sample size between groups how do i find the sample size differences of the three groups what is the average sample size for the difference in responses how do you calculate sample size for a sample of students who are in three different schools sample size for differences between two groups what sample size is needed for a snazzy study how can you determine the difference between two schools how many students should i sample for a t test how do i know the sample size of a sample for a comparison how is sample size compared to sample size how do you find a 20% difference in the responses to school question what is the sample size of a sample difference between three groups of students how does this measure which of the following is the sample size of a sample to determine the difference between different schools? what is the sampling size for the two schools in the study? how does a sample size of 294 determine the difference between three groups?