For a sample of 36 items from a population for which the standard deviation $\alpha = 12$ the sample mean is 350.Use the 95% confidence interval to test the hypothesis H₀: $\mu$ = 400 versus H₁: $\mu \neq$ 400 at the $\alpha$ = .05 level of significance.

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The Answer of For a sample of 36 items from a population for which the standard deviation $\alpha = 12$ the sample mean is 350.Use the 95% confidence interval to test the hypothesis H₀: $\mu$ = 400 versus H₁: $\mu \neq$ 400 at the $\alpha$ = .05 level of significance.

For a Sample of 36 Items from a Population for Which