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The Complete Idiot's Guide to Statistics, 2nd Edition by Robert Donnelly

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Your Turn

1. Calculate the variance, standard deviation, and the range for the following sample data set: 20, 15, 24, 10, 8, 19, 24.
2. Calculate the variance, standard deviation, and the range for the following population data set: 84, 82, 90, 77, 75, 77, 82, 86, 82.
3. Calculate the variance, standard deviation, and the range for the following sample data set: 36, 27, 50, 42, 27, 36, 25, 40.
4. Calculate the quartiles and the cutoffs for the outliers for the following data set: 8, 11, 6, 2, 11, 6, 5, 6, 10, 15.
5. A company counted the number of their employees in each of the age classes as follows. According to this distribution, what is the standard deviation for the age of the employees in the company?
6. A company counted the ...

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