Statistics

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Let's pretend the Work variable is normally distributed, with a mean/median/mode value of 22 and a standard deviation of 17. Based on these numbers, we can say that approximately 68 percent of students work between ______ and ______ hours per week. Select the TWO numbers below that should fit in these blanks.


0
5
15
22
27
32
39
45

  • Statistics -

    68% = mean ± 1 SD

    However you should note that the distribution as described cannot be normally distributed. Two SD below the mean would be negative 12. How would you get -12 of work?

  • Statistics -

    5 and 22

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