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If the mean of a set of data is 27 and the standard deviation is 6, which of the following contains the interval two standard deviations from the mean?
A. 9 to 15
B. 9 to 21
C. 15 to 39
D. 21 to 33
E. 27 to 37
Answer: C
Source: Princeton Review
A. 9 to 15
B. 9 to 21
C. 15 to 39
D. 21 to 33
E. 27 to 37
Answer: C
Source: Princeton Review
