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The ages of members of a policy action group are normally distributed with a mean of 33 years in a standard deviation of 2 years there are 400 members in the group
About how many members are expected to be between 29 years old and 37 years old?

A.272
B290
C354
D 380

 Apr 2, 2019
 #1
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\(\text{similar to last one}\\ p = \Phi\left(\dfrac{37-33}{2}\right)-\Phi\left(\dfrac{29-33}{2}\right)\\ n = 400 p\)

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 Apr 2, 2019

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