For a sample of size 16, the critical values of chi-square for a 95 percent confidence interval for the population variance are: A)6.262, 27.49 B)6.908, 28.85 C)5.629, 26.12 D)7.261, 25.00 Using d.f. = n - 1 = 15, we get χ²_L = 6.262 and χ²_U = 27.49 from AppendixE.

Question

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The correct critical values for a 95% confidence interval for the population variance with a sample size of 16 (thus, degrees of freedom = 15) are 6.262 and 27.49.

For a Sample of Size 16, the Critical Values of Chi-Square