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For Questions 1-4, consider the following: A study is designed to determine the effect of an office-training course on typing productivity. Fifteen typists who have not taken the course are randomly selected. The investigator assigns 20 pages of equally difficult text to be typed by each typist both before and after completing the training course. The investigator wants to find out whether the training course has reduced the number of errors by more than 10. Define d = Before - After. The sample mean of the 15 before values turn out to be 32.745. The sample mean of the 15 after values is calculated as 21.394. What is the point estimate of the difference in typing errors before and after taking the course (in other words, what is the point estimate for the mean of "d")?

For Questions 1-4, consider the following: A study is designed to determine the effect of an office-training course on typing productivity. Fifteen typists who have not taken the course are randomly selected. The investigator assigns 20 pages of equally difficult text to be typed by each typist both before and after completing the training course. The investigator wants to find out whether the training course has reduced the number of errors by more than 10. Define d = Before - After. The sample mean of the 15 before values turn out to be 32.745. The sample mean of the 15 after values is calculated as 21.394. What is the point estimate of the difference in typing errors before and after taking the course (in other words, what is the point estimate for the mean of "d")?

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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For Questions 1-4, consider the following: A study is designed to determine the effect of an office-training course on typing productivity. Fifteen typists who have not taken the course are randomly selected. The investigator assigns 20 pages of equally difficult text to be typed by each typist both before and after completing the training course. The investigator wants to find out whether the training course has reduced the number of errors by more than 10. Define d = Before - After. The sample mean of the 15 before values turn out to be 32.745. The sample mean of the 15 after values is calculated as 21.394. What is the point estimate of the difference in typing errors before and after taking the course (in other words, what is the point estimate for the mean of "d")?
Transcribed Image Text:For Questions 1-4, consider the following: A study is designed to determine the effect of an office-training course on typing productivity. Fifteen typists who have not taken the course are randomly selected. The investigator assigns 20 pages of equally difficult text to be typed by each typist both before and after completing the training course. The investigator wants to find out whether the training course has reduced the number of errors by more than 10. Define d = Before - After. The sample mean of the 15 before values turn out to be 32.745. The sample mean of the 15 after values is calculated as 21.394. What is the point estimate of the difference in typing errors before and after taking the course (in other words, what is the point estimate for the mean of "d")?
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