1. Suppose a random sample of 50 basketball players showed the average height to be 78 inches. Also assume that the population standard deviation is 1.5 inches. (a) Find a 99% confidence interval for the population mean height. (b) Find a 95% confidence interval for the population mean height. (c) Find a 90% confidence interval for the population mean height. (d) Find an 85% confidence interval for the population mean height.

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1. Suppose a random sample of 50 basketball players showed the average height to be 78 inches. Also
assume that the population standard deviation is 1.5 inches.
(a) Find a 99% confidence interval for the population mean height.
(b) Find a 95% confidence interval for the population mean height.
(c) Find a 90% confidence interval for the population mean height.
(d) Find an 85% confidence interval for the population mean height.
down? If
(e) What do you notice about the length of the confidence interval as the confidence level
you used a confidence level of 80%, would you expect the confidence interval to be longer or shorter
than that of 85%? Run the program again to verify your answer.
goes
Transcribed Image Text:1. Suppose a random sample of 50 basketball players showed the average height to be 78 inches. Also assume that the population standard deviation is 1.5 inches. (a) Find a 99% confidence interval for the population mean height. (b) Find a 95% confidence interval for the population mean height. (c) Find a 90% confidence interval for the population mean height. (d) Find an 85% confidence interval for the population mean height. down? If (e) What do you notice about the length of the confidence interval as the confidence level you used a confidence level of 80%, would you expect the confidence interval to be longer or shorter than that of 85%? Run the program again to verify your answer. goes
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