Two separate samples receive different treatments. After treatment, the first sample has n 5 6 with SS 5 236, and the second has n = 12 with SS = 340. a. Compute the pooled variance for the two...

Two separate samples receive different treatments. After treatment, the first sample has n 5 6 with SS 5 236, and the second has n = 12 with SS = 340.

a. Compute the pooled variance for the two samples.

b. Calculate the estimated standard error for the sample mean difference.

c. If the sample mean difference is 7 points, is this enough to reject the null hypothesis using a two tailed test with a = .05?