Use the following to answer questions :
The variance of the prices of all college textbooks was 81.30 last year.A recent sample of 20 college textbooks produced a variance of their prices equal to 164.649.The null hypothesis is that the current variance of the prices of all college textbooks is equal to 81.30 and the alternative hypothesis is that the current variance of the prices of all college textbooks is greater than 81.30.Assume that the prices of college textbooks are normally distributed.The significance level is 1%.
-The critical value of chi-square is:
A) 36.191
B) 38.582
C) 39.997
D) 37.566
Correct Answer:
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