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Math Help - Under a normal curve, check answer please.

  1. #1
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    Question Under a normal curve, check answer please.

    The area under a normal curve between the scores for z=2.20 and z=0.85 is ___.

    2.20=0.4861
    0.85=0.3023

    so, 0.4861+0.3023=0.7884. 0.7884 is my answer, thanks for checking my answer, list of possible anwer are -

    1. 0.3023
    2. 0.7884
    3. 0.1838
    4. 0.4861
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  2. #2
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    Looking in the z-table, I see the corresponding area are:

    For z=2.20, .0.9861

    For z=0.85, 0.8023

    0.9861-0.8023=.1838
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  3. #3
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    Smile thanks

    I have the same table, looks like I looked at it wrong.
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