The Mean Replacement Time for a Random Sample of 12

question 27

Multiple Choice

The mean replacement time for a random sample of 12 CD players is 8.6 years with a standard deviation of 5.8 years. Construct the 98% confidence interval for the population variance, σ2. Assume the data are normally distributed, and round to the nearest hundredth when necessary.

• A) (14.97, 121.19)
• B) (3.87, 11.01)
• C) (2.58, 20.89)
• D) (14.11, 103.62)

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