2.Samples are taken from two populations A and B with the following results: A

2.Samples are taken from two populations A and B with the following results: A B Sample Size 100 200 Sample Mean 25 23
Sample Variance 1.21 1.01 You wish to test this hypothesis at the 1% significant level: H0: u1 ? u2 against H1: u1 < u2. What decision rule would you use ? Answer A. Reject H0 if test statistic > -2.33. B. Reject H0 if test statistic > 2.33. C. Reject H0 if test statistic
3.These two data sets are dependent. Find D (the sample mean of the paired differences). X 11.8 11.3 10.6 12.9 11.1 Y 10.3 12.6 11.6 10.7 10.0 Answer A. 0.3
B. 0.7 C. 05 D. 0.6