Question: In order to construct a confidence interval for the population variance, a random sample of n observations is drawn from a normal population. Use this

In order to construct a confidence interval for the population variance, a random sample of n observations is drawn from a normal population. Use this information to find and under the following scenarios.

a. A 95% confidence level with n = 18

b. A 95% confidence level with n = 30

c. A 99% confidence level with n = 18

d. A 99% confidence level with n = 30

a/2.df X1-a/2,df

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