A certain test preparation course is designed to help students improve their scores on the GMAT exam. A mock exam is giv

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A certain test preparation course is designed to help students improve their scores on the GMAT exam. A mock exam is giv

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A Certain Test Preparation Course Is Designed To Help Students Improve Their Scores On The Gmat Exam A Mock Exam Is Giv 1
A Certain Test Preparation Course Is Designed To Help Students Improve Their Scores On The Gmat Exam A Mock Exam Is Giv 1 (11.96 KiB) Viewed 50 times
A certain test preparation course is designed to help students improve their scores on the GMAT 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 3 students' scores on the exam after completing the course 17, 20, 26 Using these data, construct a 95% 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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