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January 31, 2015

January 31, 2015

Posted by **courntey** on Saturday, September 17, 2011 at 10:00pm.

A random sample of the test scores of 100 applicants for college entry at a large junior college showed a mean score of 72.6. Determine a 99%, 95%, and 90% confidence interval for the m

mean score of all applicants at the

junior college. Assume the standard deviation of test scores is 10.5.

PTS Confidence interval

4 1. 99% confidence level x

4 2. 95% confidence level x

4 3. 90% confidence level x

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