Author Question: Construct a 95% Z-interval or a 95% t-interval about the population mean. Assume the data come from ... (Read 66 times)

kellyjaisingh · **on:** Jan 16, 2020

Construct a 95% Z-interval or a 95% t-interval about the population mean. Assume the data come from a population that is approximately normal with no outliers.

The heights of 20- to 29-year-old females are known to have a population standard deviation

inches. A simple random sample of n = 15 females 20 to 29 years old results in the following data:

◦ (64.85, 67.85); we are 95% confident that the mean height of 20- to 29-year-old females is between 64.85 and 67.85 inches.
◦ (65.20, 67.50); we are 95% confident that the mean height of 20- to 29-year-old females is between 65.20 and 67.50 inches.
◦ (64.98, 67.72); we are 95% confident that the mean height of 20- to 29-year-old females is between 64.98 and 67.72 inches.
◦ (65.12, 67.58); we are 95% confident that the mean height of 20- to 29-year-old females is between 65.12 and 67.58 inches.

meryzewe · **Reply #1 on:** Jan 16, 2020

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