Scott and Bella are excited that they got to know 20 of their fellow peers.Now that the Fall term of Think Smarter University is half way over they have learned enough in their Introduction to Statistics class to calculate the mean and standard deviation of each of the four categories.The table below shows their findings:

Age:The age of each classmate in years.

Cafeteria Food Rating: Each student rated the cafeteria food from 1 (Disgusting) to 5 (Fantastic).

Grade Point Average:The GPA for each student on a 4 point scale.

Height:The height of each student in inches.

Scott and Bella have decided that they want to complete some additional analysis of their work.Please help Scott and Bella answer the following questions:

1.Given the above information for the age in years of the Think Smarter University students construct a 80% confidence interval for the population mean.Assume the population standard deviation is equal to the sample standard deviation. (5 points)