Chemistry
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Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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20,18,2,4,15,15,10
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.
Construct the 80% confidence interval. 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 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 7
students' scores on the exam after completing the course:
20, 18, 2, 4, 15, 15, 10
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.
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Step 4 of 4: Construct the 80 % confidence interval. Round your answer to one decimal place.
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