Variance & standard deviation
9 practice questionsIntroductory StatisticsStep-by-step solutions
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1
If every value in a data set is identical, the standard deviation is:
A.0
B.1
C.Equal to the mean
D.Undefined
2
Standard deviation measures what?
A.Typical spread of data around the mean
B.The exact center only
C.The number of labels
D.The sample name
3
The standard deviation is related to the variance by which operation?
A.It is the square of the variance
B.It is the square root of the variance
C.It is half the variance
D.They are always equal
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