A simple random sample of 60 items resulted in a sample mean of 71. The population standard deviation is 15. a. Compute
Posted: Mon Jul 11, 2022 11:39 am
A simple random sample of 60 items resulted in a sample mean of71. The population standard deviation is 15.
a. Compute the 95% confidence interval for the population mean(to 1 decimal).
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b. Assume that the same sample mean was obtained from a sampleof 120 items. Provide a 95% confidence interval for the populationmean (to 2 decimals).
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c. What is the effect of a larger sample size on the margin oferror?
a. Compute the 95% confidence interval for the population mean(to 1 decimal).
( , )
b. Assume that the same sample mean was obtained from a sampleof 120 items. Provide a 95% confidence interval for the populationmean (to 2 decimals).
( , )
c. What is the effect of a larger sample size on the margin oferror?