The Centers for Disease Control and Prevention (CDC) defines a healthy sleep duration to be at least seven hours per day. The CDC reports that the percentage of people who report a healthy sleep duration varies by marital status. The CDC also reports that in,of those who are married report a healthy sleep duration;of those who have never been married report a healthy sleep duration; andof those who are divorced, widowed, or separated report a healthy sleep duration. The fileSleepHabitscontains sample data on the sleeping habits of people who have never been married that are consistent with the CDC's findings. Use these data to answer the following questions. Click on the datafile logo to reference the data.

a.Develop a point estimate and aconfidence interval for the proportion of those who have never been married who report a healthy sleep duration.

Point estimate(todecimals)Confidence intervalto(todecimals)

b.Develop a point estimate and aconfidence interval for the mean number of hours of sleep for those who have never been married.

Point estimate(todecimals)Confidence intervalto(todecimals)

c.For those who have never been married, estimate the number of hours of sleep per day for those who report a healthy sleep duration (todecimals).