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    lenw21's Avatar
    lenw21 Posts: 1, Reputation: 1
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    #1

    Nov 29, 2009, 06:32 PM
    What is the z-score of a sample with n-size of 144 and a mean of 11
    Hello, I am trying to solve this problem for my statistics homework.. I am stuck.. HELP!

    What is the z-score of a sample with n-size of 144 and a mean of 11;
    Standard Dev: 4
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Dec 1, 2009, 08:05 AM

    Somebody correct me if I'm wrong.

    Use the formula:
    morgaine300's Avatar
    morgaine300 Posts: 6,561, Reputation: 276
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    #3

    Dec 9, 2009, 02:13 AM

    The equation is correct, but there is no z-score for what OP posted. A z score is how many standard deviations something is away from the mean. The mean is 11, but there is no "something." That is, the z-score of WHAT?
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