Question: 7. The 95% confidence interval estimate for a population variance when a sample variance of 324 is obtained from a sample of 81 items is:

7. The 95% confidence interval estimate for a population variance when a sample variance of 324 is obtained from a sample of 81 items is: (B)

A. 14.14 to 174.94

B. 243.087 to 453.518

C. 16.42 to 194.35

D. 15.591 to 21.296

E. None of the above

The answer is B but I NEED HELP WITH THE STEPS. PLEASE SHOW STEPS.

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