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Suppose that the scores on a reading ability test are normally distributed with a mean of...

Suppose that the scores on a reading ability test are normally distributed with a mean of 60 and a standard deviation of 8. What proportion of individuals score at least 49 points on this test? Round your answer to at least four decimal places.

Math   Statistics-And-Probability   
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Answer #1

X : the scores on a reading ability test

X ~ N(60,8)

the proportion of individuals score at least 49 points on this test is:-

[ in any blank cell of excel type =NORMSDIST(1.375) ]

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