Question 14 2 pts Which of the following is not part of conducting a t test for independent means? O the standard deviation of the distribution of differences between means is figured O the pooled estimate of the population variance is figured O a comparison is made against a Z distribution O the variance of the distribution of differences between means is figuredQuestion 15 2 pts The formula for the pooled population variance estimate that is used in the module combines the variance estimates in such a way as to give more influence to the variance estimate based on _ _ _ _ _ _ participants O the smaller number of O the larger number of