# statistics question - normal distribution

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If scores are normally distributed with a mean of 100 and a standard deviation of 15, what percent of the scores are:

(a) greater than 100?

(b) greater than 115?

(c) between 100 and 130?

https://brainmass.com/statistics/normal-distribution/statistics-question-normal-distribution-19621

## SOLUTION This solution is **FREE** courtesy of BrainMass!

a) greater than 100 - 50%.(Z value is 0)

<br>b)>115 - 15.865 percent ( 1-Normsdist(1))

<br>c) between 100 and 130 = 47.7225% ( area between Z(0) AND Z(2).

https://brainmass.com/statistics/normal-distribution/statistics-question-normal-distribution-19621