Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a

90% confidence level. What does the confidence interval tell about the population of all college students in the state?

3.6

3.1

3.9

4.6

2.9

4.5

3.7

4.4

4.1

4.2

4.3

3.9

3.6

3.8

3.8

What is the confidence interval for the population mean ?

enter your response here<

(Round to two decimal places as needed.)

What does the confidence interval tell about the population of all college students in the state? Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice.

A.

We are confident that 90% of all students gave evaluation ratings between

enter your response here

and

enter your response here.

(Round to one decimal place as needed.)

B.

We are 90% confident that the interval from

enter your response here

to

enter your response here

actually contains the true mean evaluation rating.

(Round to one decimal place as needed.)

C.

The results tell nothing about the population of all college students in the state, since the sample is from only one university.