Assume the Sample Is Taken from a Normally Distributed Population $\sigma ^ { 2 }.$

question 51

Multiple Choice

Assume the sample is taken from a normally distributed population and construct the indicated confidence interval.
-The mean replacement time for a random sample of 12 microwave ovens is 8.6 years with a standard deviation of 5.3 years. Construct the 98% confidence interval for the population variance, $\sigma ^ { 2 }.$

• A)(12.5, 101.2)
• B)(3.5, 10.1)
• C)(2.4, 19.1)
• D)(11.8, 86.5)

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