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    Standard Deviation and Normal Distribution

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    A major department store has determined that its customers charge an average of $500 per month, with a standard deviation of $80. Assume the amounts of charges are normally distributed.
    a. What percentage of customers charges more than $380 per month?
    b. What percentage of customers charges less than $340 per month?
    c. What percentage of customers charges between $644 and $700 per month?

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    A major department store has determined that its customers charge an average of $500 per month, with a standard deviation of $80. ...

    Solution Summary

    Standard deviation and normal distribution is examined.

    $2.19

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