Given the sample mean and the sample standard deviation. Construct the? 90% and? 95% confidence intervals for the population mean. A random sample of 35 home theater systems has a mean price of ?$146.00 and a standard deviation is ?$16.70
Construct a? 90% confidence interval for the population mean.
Construct a? 95% confidence interval for the population mean.
Choose the correct answer below.
A. With? 90% confidence, it can be said that the population mean price lies in the first interval. With? 95% confidence, it can be said that the population mean price lies in the second interval. The? 95% confidence interval is wider than the? 90%.
B. With? 90% confidence, it can be said that the sample mean price lies in the first interval. With? 95% confidence, it can be said that the sample mean price lies in the second interval. The? 95% confidence interval is wider than the? 90%.
C. With? 90% confidence, it can be said that the population mean price lies in the first interval. With? 95% confidence, it can be said that the population mean price lies in the second interval. The? 95% confidence interval is narrower than the?90%.