A certain test preparation course is designed to help students improve their scores on the MCAT 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 7 students' scores on the exam after completing the course: 37, 12, 12, 17, 13, 32, 23 Using these data, construct a 80 % 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 1 of 4: Calculate the sample mean for the given sample data. Round your answer to one decimal place.

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A certain test preparation course is designed to help students improve their scores on the MCAT 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 7 students' scores on the exam after completing the course:
37, 12, 12, 17, 13, 32, 23
Using these data, construct a 80 % 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 1 of 4: Calculate the sample mean for the given sample data. Round your answer to one decimal place.
Transcribed Image Text:A certain test preparation course is designed to help students improve their scores on the MCAT 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 7 students' scores on the exam after completing the course: 37, 12, 12, 17, 13, 32, 23 Using these data, construct a 80 % 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 1 of 4: Calculate the sample mean for the given sample data. Round your answer to one decimal place.
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