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    rjschneck02's Avatar
    rjschneck02 Posts: 1, Reputation: 1
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    #1

    Mar 5, 2010, 03:00 PM
    Statistics help please!
    The incomes of trainees at a local mill are normally idstributed with a mean of $1100. And a standard deviation of $150. . What percentage of trainees earn less than $900 a month.
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Mar 6, 2010, 04:22 AM

    Just use and look it up in the z-table.
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