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    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.