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Given a normal distribution with a mean of 50 and a variance of 64, what percent...

Given a normal distribution with a mean of 50 and a variance of 64, what percent of the normal distribution falls between 60 and 70? I understand the formula but I don't understand how to find the percent.

Math   Statistics-And-Probability   
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Answer #1

mean = 50

variance = 64

standard deviation = sqrt(64) = 8

The following information has been provided:

  

We need to compute . The corresponding z-values needed to be computed are:

Therefore, we get:

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