Question: Suppose that n = 10 and s 2 = 9. Assume normality. a. Compute a 95 percent confidence interval for 2 . b. Test

Suppose that n = 10 and s2 = 9. Assume normality. 

a. Compute a 95 percent confidence interval for σ2.

b. Test the null hypothesis H0: σ2 = 15 versus Ha: σ2 < 15 at the .05 level of significance.

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