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April 18, 2015

Homework Help: Statistics

Posted by Lexie on Saturday, September 13, 2008 at 5:09pm.

Help me understand this problem, I have several more like this & want to get an understanding on to solve it:

The mean score,x, on an aptitude test for a random sample of 9 students was 64. Assuming that standard deviation=16, construct a 95.44% confidence interval for the mean score of all students taking the test.

A. 53.3 to 74.7 B. 60.4 to 67.6 C. 32 to 96 D. 56.0 to 72.0

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