99% confidence interval for the population mean is provided, resulting in a sample mean of 80. The population standard deviation is ĆĘ = 15. Compute the 95% confidence interval obtained from a sample of 20 items. Assume that the same sample mean was obtained from a larger sample size. What is the effect of a larger sample size on the interval estimate?
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For the first question, we are given a sample mean of 80, a sample size of 60, and a population standard deviation of 15. We want to find the 99% confidence interval for the population mean. Using the formula for a confidence interval for the population mean with Show moreā¦
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