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Math Help - Given the following frequency distribution, find the mean, variance, and standard dev

  1. #1
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    Given the following frequency distribution, find the mean, variance, and standard dev

    I will be sure to fail this course.

    Error Frequency
    46-48 22
    49-51 23
    52-54 23
    55-57 9
    58-60 7
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  2. #2
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    Quote Originally Posted by caligirl350 View Post
    I will be sure to fail this course.

    Error Frequency
    46-48 22
    49-51 23
    52-54 23
    55-57 9
    58-60 7
    What do your class notes or textbook say on how to do this?
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