Is this sample of 25 exam scores inconsistent with the hypothesis that the true variance is 64 (i.e.,s = 8)? Use the 5 percent level of significance in a two-sided test. Show all steps, including the hypotheses and critical values from Appendix E.
80 79 69 71 74
73 77 75 65 52
81 84 84 79 70
78 62 77 68 77
88 70 75 85 84