Math

The combined math and verbal scores for students taking a national standardized examination for college admission, is normally distributed with a mean of 620 and a standard deviation of 220. If a college requires a student to be in the top 10 % of students taking this test, what is the minimum score that such a student can obtain and still qualify for admission at the college?
answer:(round to the nearest integer)

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  1. using my favourite normal distribution graphing calculator (same as tables in back of text books)

    http://davidmlane.com/hyperstat/z_table.html

    click on
    "value from an area"
    then enter:
    area = .9 (to be in top 10%, 90 must be "below" )
    mean = 620
    SD = 220
    click on "below" and recalculate to get 901.98 or 902

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