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 3 students' scores on the exam after completing the course: 23, 17, 19 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 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 3 students' scores on the exam after completing the course: 23, 17, 19 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 3 of 4: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Round your answer to three decimal places
Transcribed Image Text: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 3 students' scores on the exam
after completing the course:
23, 17, 19
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 3 of 4: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
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