# Variance and standard deviation

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Student A received the following course grades during her first year of college:

4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 0.

Student B received the following grades during her first year of college:

4, 4, 4, 4, 4, 4, 3, 1, 1, 1.

(a) Write down the relative frequency distribution tables for each student, and compute the population means and variances.

(b) Which student had the better grade point average? Student A or Student B?

(c) Which student was more consistent?

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