Assume that the mean score on a certain aptitude test across the nation is 100, and that the standard

Favorites|Homepage
Subscriptions | sitemap

HOME > > Assume that the mean score on a certain aptitude test across the nation is 100, and that the standard

Assume that the mean score on a certain aptitude test across the nation is 100, and that the standard

[From: ] [author: ] [Date: 12-06-25] [Hit: ]

......

deviation is 20 points. Find the probability that the mean aptitude test score for a randomly selected group of 150 8th graders is between 101.5 and 98.5.

-

P(x< 98.5) = P(z < (98.5-100)/20/sqrt(150)) = P(z < -0.9186) = 0.1792
P(x< 101.5) = P(z < (101.5-100)/20/sqrt(150)) =P(z < 0.91856) = 0.8208

difference = .6416

1

keywords: test,across,certain,score,that,Assume,and,is,nation,100,on,mean,aptitude,standard,the,Assume that the mean score on a certain aptitude test across the nation is 100, and that the standard

New

Hot