- A Certain Test Preparation Course Is Designed To Help Students Improve Their Scores On The Gre Exam A Mock Exam Is Give 1 (20.82 KiB) Viewed 24 times
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A certain test preparation course is designed to help students improve their scores on the GRE 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 6 students' scores on the exam after completing the course: 23, 19,1, 12, 8, 32 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 2 of 4: Calculate the sample standard deviation for the given sample data. Round your answer to one decimal place
A certain test preparation course is designed to help students improve their scores on the GRE 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 6 students scores on the exam after completing the course: 23, 19.1, 12, 8, 32 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 3 of 4: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
A certain test preparation course is designed to help students improve their scores on the GRE 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 6 students' scores on the exam after completing the course 23, 19,1, 12, 8,32 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 4 of 4: Construct the 95% confidence interval. Round your answer to one decimal place.