post-test after. The results are shown in the table below. Pre-test (1) Post-test (2) Difference, d = x2-x1 59 31 -28 57 56 -1 66 48 -18 9 44 36 -8 B 73 67 -6 64 36 -28 59 63 4 72 65 -7 51 44 -7 Can we say that the review session significantly harms test performance at 5% significance level? 1. The null and alternative hypotheses would be: Ho: pd= 00 0 H: Pd 2. The tail type of the test is: Left-Tailed 3 The sample statistic. d is: B