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A company claims that the course they offer significantly increases the writing speed of secretaries. The following table gives the scores of eight secretaries before and after the attended this course. 81 97 75 72 65 | 90 70 69 78 | 115 | 75 69 Before After 89 93 91 110 Make a 90 % confidence interval for the mean 4x – Hy of the population paired differences, where a paired differences is equal to the score before attending the course minus the score after attending the course.

A company claims that the course they offer significantly increases the writing speed of secretaries. The following table gives the scores of eight secretaries before and after the attended this course. 81 97 75 72 65 | 90 70 69 78 | 115 | 75 69 Before After 89 93 91 110 Make a 90 % confidence interval for the mean 4x – Hy of the population paired differences, where a paired differences is equal to the score before attending the course minus the score after attending the course.

MATLAB: An Introduction with Applications
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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A company claims that the course they offer significantly increases the writing speed of secretaries. The following table gives the scores of eight secretaries before and after they attended this course. Before After 81 75 89 91 65 70 90 69 97 72 93 110 78 69 115 | 75 Make a 90 % confidence interval for the mean Ax -Hy of the population paired differences, where a paired differences is equal to the score before attending the course minus the score after attending the course.
Transcribed Image Text:A company claims that the course they offer significantly increases the writing speed of secretaries. The following table gives the scores of eight secretaries before and after they attended this course. Before After 81 75 89 91 65 70 90 69 97 72 93 110 78 69 115 | 75 Make a 90 % confidence interval for the mean Ax -Hy of the population paired differences, where a paired differences is equal to the score before attending the course minus the score after attending the course.
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