Question: 50 students were polled and asked their age. The sample mean was 23.4 years and the sample standard deviation was 7.2 years. Assume student ages

50 students were polled and asked their age. The sample mean was 23.4 years and the sample standard deviation was 7.2 years. Assume student ages are approximately normally distributed. Find a 90% confidence interval estimate for the population standard deviation . Since the mean and standard deviation are given to tenths place, so should the limits of your interval. __________ < < ___________

Find a 90% confidence interval estimate for the population standard deviation . Round to the nearest tenths place. Note: Since your table does not show 49 degrees of freedom, use the tables values for 50 degrees of freedom.

My answer was 6,2 and 8.7 I showed that isn't correct

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