When a survey asked, "About how many hours per week do you spend sending and answering e-mail?" the 7 females in the survey sample of age at least 80 had the following responses.Use the data to complete parts a through c.

0 0 1 2 7 9 16

a. Using technology, find the sample mean, standard deviation, and the standard error of the sample mean. The sample mean is . (Round to two decimal places as needed.) The sample standard deviation is . (Round to two decimal places as needed.) The standard error of the sample mean is (Round to two decimal places as needed.) b. Using technology, find and interpret a 90% confidence interval for the population mean. The 90% confidence interval for the population mean is ( (Round to one decimal place as needed.) Interpret the confidence interval from the previous step. Choose the correct answer below. O A. Approximately 90% of the population send and answer e-mail between these two values in hours per week. O B. There is 0.95% confidence that the population mean for the number of hours per week people spend sending and answering e-mail is between these two values. C. There is 90% confidence that the population mean for the number of hours per week people spend sending and answering e-mail is between these two values. O D. There is 0.90% confidence that the population mean for the number of hours per week people spend sending and answering e-mail is between these two values