MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Suppose we are contracted by the Justice Department to study the extent of juvenile delinquency.  We take a random sample of 100 juveniles, and we find that the mean number of crimes committed is 12 with a standard deviation of 7.

Test the null hypothesis that the mean number of crimes committed by the population of juveniles is less than or equal to 11.  Use a significance level of .05.  (Be sure to show the numeric results that lead to your decision.) 

Do we reject the null hypothesis here? why or why not.

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