The average amount of time, in minutes, for students to complete a standardized test is normally distributed. A data analyst takes a sample of n=39

student times and finds a 90%

confidence interval to be [108.2,147.8]

.

Pick

The average amount of time taken on the test by all students

The average amount of time taken on the test by the sample of 39 students

The sample size n = 39

Pick

10% confidence exists that the average time taken on the test is between 108.2 and 147.8.

90% confidence exists that the average time taken on the test is between 108.2 and 147.8.

90% of the sample data falls between 108.2 and 147.8.

90% of the students will take between 108.2 and 147.8 minutes to complete the test.