Assume a normal population with known variance σ2, a random
sample (n< 30) is selected. Let...
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Assume a normal population with known variance σ2, a randomsample (n< 30) is selected. Let x¯,s represent the sample meanand 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 confidenceinterval formula in (1).
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Let X has a normal distribution with mean and variance Then we know that has a Normal distribution with mean and Variance Therefore by definition we havewill have a N01The 98
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