Posted by **Michelle** on Tuesday, November 20, 2012 at 3:00pm.

Entry to a certain University is determined by a national test. The scores on this test are normally distributed with a mean of 500 and a standard deviation of 100. Tom wants to be admitted to this university and he knows that he must score better than 70% of the students who took the test. What should Tom's score at least be in order to be admitted.

NOTE: WRITE YOUR ANSWER USING 4 DECIMAL DIGIT. FOR EXAMPLE 0.1234 OR 3.2450. DO NOT ROUND UP OR DOWN THE LAST DECIMAL DIGIT.

- statistics -
**dick**, Wednesday, November 21, 2012 at 12:46pm
42324213

- statistics -
**PsyDAG**, Wednesday, November 21, 2012 at 12:50pm
Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion (.70) in larger portion and its Z score. Insert the Z score in the above equation to find the score.

- statistics -
**Anonymous**, Wednesday, November 21, 2012 at 1:18pm
so the equation would be..

.7580=(x-500)/100

but i'm not getting a clear answer.

## Answer this Question

## Related Questions

- statistics! - 1) Entry to a certain University is determined by a national test...
- statistics - the admissions policy at a certain university requires that ...
- statistics - the admissions policy at a certain university requires that ...
- math - Test scores on a university admissions test are normally distributed, ...
- statistics - Ram earned a score of 940 on a national achievement test. The mean ...
- statistics - The Intelligence Quotient (IQ) test scores are normally distributed...
- stats - Test scores on a university admissions test are normally distributed, ...
- statistics - the dean of admissions in a large university has determined that ...
- maths - Suppose scores on an IQ test are normally distributed.If the test has ...
- Math - Suppose scores on an IQ test are normally distributed. If the test has a...

More Related Questions