A certain test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at the beginning and end of the course to determine the effectiveness of the course. The following measurements are the net change in 5 students' scores on the exam after completing the course:

20, 26, 20, 11, 19

Using these data, construct a 90% confidence interval for the average net change in a student's score after completing the course. Assume the population is approximately normal.

Step4of4:

Construct the 90% confidence interval. Round your answer to one decimal place.

A certain test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at the beginning and end of the course to determine the effectiveness of the course. The following measurements are the net change in 5 students' scores on the exam after completing the course: 20, 26, 20,11,19 Using these data, construct a 90 % confidence interval for the average net change in a student's score after completing the course. Assume the population is approximately normal. Copy Data Step 4 of4: Construct the 90 % confidence interval. Round your answer to one decimal place. Answer Tables E Keypad How to enter your answer (opens in new window) Keyboard Shortcuts Previous step answers Lower endpoint: Upper endpoint