October 4, 2015

Homework Help: math

Posted by King on Friday, May 25, 2012 at 12:55pm.

In a random sample of 1,000 exams, the average score was 500 points with a standard deviation of 80 points. Find the interval about the sample mean such that the probability is 0.90 that the mean number lies within the interval.

Answer this Question

First Name:
School Subject:

Related Questions

More Related Questions