For a Sample of Size 11, the Critical Values of Chi-Square

Multiple Choice

For a sample of size 11, the critical values of chi-square for a 90 percent confidence interval for the population variance are:

A) 6.262, 27.49
B) 6.908, 28.85
C) 3.940, 18.31
D) 3.247, 20.48 d.f. = n - 1 = 10, we get χ²_L = 3.940 and χ²_U = 18.31 from AppendixE.