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The Researcher's Null Hypothesis Is H0: σ2 = 420

Question 43

Multiple Choice

The researcher's null hypothesis is H0: σ2 = 420. A sample of n = 18 items yields a sample variance of s2 = 512. The critical values of chi-square for a two-tailed test at α = .05 are:


A) 8.672 and 27.59
B) 7.564 and 30.19
C) -1.960 and +1.960
D) 9.390 and 28.87

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