Homework Help: Statistics

Posted by Sarah on Friday, November 4, 2011 at 4:58pm.

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 - PsyDAG, Saturday, November 5, 2011 at 1:35pm
68% = mean ą 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?

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