The effectiveness of a test preparation course was studied for a random sample of 75 subjects who took the SAT before and after coaching. The differences between the scores resulted in a mean increase of 0.6 and a standard deviation of 3.8. (See “An Analysis of the Impact of Commercial Test Preparation Courses on SAT Scores," by Sesnowitz, Bernhardt, and Kwain, American Education Research Journal, Vol. 19, No. 3.) At the D.05 significance level, test the claim that the population mean increase is greater than 0, indicating that the course is effective in raising scores. Should people take this course?
The effectiveness of a test preparation course was studied for a random sample of 75 subjects who took the SAT before and after coaching. The differences between the scores resulted in a mean increase of 0.6 and a standard deviation of 3.8. (See “An Analysis of the Impact of Commercial Test Preparation Courses on SAT Scores," by Sesnowitz, Bernhardt, and Kwain, American Education Research Journal, Vol. 19, No. 3.) At the D.05 significance level, test the claim that the population mean increase is greater than 0, indicating that the course is effective in raising scores. Should people take this course?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Transcribed Image Text:The effectiveness of a test preparation course was studied for a random
sample of 75 subjects who took the SAT before and after coaching. The
differences between the scores resulted in a mean increase of 0.6 and a
standard deviation of 3.8. (See “An Analysis of the Impact of Commercial
Test Preparation Courses on SAT Scores," by Sesnowitz, Bernhardt, and
Kwain, American Education Research Journal, Vol. 19, No. 3.) At the
D.05 significance level, test the claim that the population mean increase is
greater than 0, indicating that the course is effective in raising scores.
Should people take this course?
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