10. Two separate samples receive different treatments. After treatment, the first sample has n 5 9 with SS 5 462, and the second has n = 7 with SS = 420. a. Compute the pooled variance for the two samples. Copyright 2012 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves b. Calculate the estimated standard error for the sample mean difference. c. If the sample mean difference is 10 points, is this enough to reject the null hypothesis using a two- tailed test with a = .05?