Question: Assume a normal distribution with known population variance. Calculate the width to estimate the population mean, m, for the following. a. 90% confidence level; n

Assume a normal with known population variance. Calculate the width to estimate the population mean, m, for the following.
a. 90% confidence level; n = 100; σ2 = 169
b. 95% confidence level; n = 120; σ = 25

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