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2. You wish to estimate the mean winning time for the Boston Marathon Women’s Open Division...

2. You wish to estimate the mean winning time for the Boston Marathon Women’s Open Division champions. The estimate must be within 0.5 hour of the population mean. Determine the minimum sample size required to construct a confidence interval for the population mean. Assume the population standard deviation is 0.15 hour.

3. From a random sample of 37 business days from February 24, 2016, through February 24, 2017, the mean closing price of Apple stock was . Assume the population standard deviation is . Use this information to construct a confidence interval for the population mean.

Critical Value Margin of Error Interval

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