# Working with probability and normal distribution

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True or false:

There is a probability a that a z score will have a value between -za/2 and za/2.

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#### Solution Preview

Assume that Z~N(0,1). For any positive real number a>0, if we want

Prob{-za/2<Z<za/2}=a. ...

#### Solution Summary

The probability and normal distribution functions are examined. The solution answers the question(s) below.

$2.49