You're given sample mean and population standard deviation. Employ this information to develop the 90% and 95% confidence intervals for population mean. Interpret the results and compare the widths of confidence intervals. If convenient, use technology to construct the confidence intervals.
A random sample of 35 home theater systems has a mean of $125.00. Assume the population standard deviation is $18.80.
Construct a 90% confidence interval for the population mean.
The 90% confidence interval for the population mean ( , ) Round to two decimal places as needed
Construct a 95% confidence interval for the population mean.
The 95% confidence interval for the population mean ( , ) Round to two decimal places as needed