Question
Asked Feb 18, 2019
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X=N(210 minutes, 45 minutes)

What percentage of runners should Finnish in less than X=255 minutes?

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Expert Answer

Step 1

normal distribution with mean 210 and Standard deviation 45.

Z score is the distance of a data point from mean of the distribution in terms of standard deviation. It is given by below mentioned formula

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Step 2

Here we need P(X < 255)

Using the Z score formula we calculate Z score for X = 255 mean =...

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Measures

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