Is this sample of 25 exam scores inconsistent with the hypothesis that the true variance is 64 (i.e., σ = 8)? Use the 5 percent level of significance in a two-tailed 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  (a)Calculate χ2

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Is this sample of 25 exam scores inconsistent with the hypothesis that the true variance is 64 (i.e., σ = 8)? Use the 5 percent level of significance in a two-tailed 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

 (a)Calculate χ2

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