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Assume a normal population with known variance σ2σ2, a random sample (n<n< 30) is selected. Let...

Assume a normal population with known variance σ2σ2, a random sample (n<n< 30) is selected. Let x¯,sx¯,s represent the sample mean and sample deviation.

(1)(2pts) write down the formula: 98% one-sided confidence interval with upper bound for the population mean.

(2)(6pts) show how to derive the confidence interval formula in 1

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