A simple random sample of 60 items resulted in a sample mean of 87. The population standard deviation is 18.
a. Compute the 95% confidence interval for the population mean (to 1 decimal). ( , )
b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals). ( , )
Get Answers For Free
Most questions answered within 1 hours.