The standard deviation of a students grades is zero.What do you know about the grades of this student? Why do you say so?
A.The student scored low grades.
B.The student scored the same grade every time
C.The student's grade is unpredictable
D.The student got a B on all tests
A.The student scored low grades.
B.The student scored the same grade every time
C.The student's grade is unpredictable
D.The student got a B on all tests
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The answer is B. If the student scored the same grade every time, then the student's grade did not deviate from the mean at all. With no deviation, the standard deviation is 0