The Mean Replacement Time for a Random Sample of 12

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)