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28 July, 18:07

Peter pine is doing his budget. he discovers that he has spent an average of $225.00 a month on entertainment for the year with a standard deviation of $75.00. what percent of his monthly expenses for this category would he expect to fall between $60.00 and $390.00

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  1. 28 July, 18:23
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    The z for $60.00 = - 2.2

    The percent of area associated with $60.00 = 48.6%

    The z for $390.00 = 2.2

    The percent of area associated with $390.00 = 48.6%

    Adding the two percentages together, Peter calculates his answer to be: 97.2%
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