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The Grades Obtained on a Test by Twelve Students in a Class

Question 23

Short Answer

The grades obtained on a test by twelve students in a class are listed below.
66,70,68,75,80,86,64,73,80,94,72,9166,70,68,75,80,86,64,73,80,94,72,91
-Find the standard deviation of the grades.

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