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MCQ
The standard deviation of the data 3, 5, 7, 9, 11 is:
Unit-11 Basic Statistics
A sqrt(6)
B sqrt(8)
C sqrt(10)
D 3
Explanation

Mean = 7. Sum of squared deviations = 16 + 4 + 0 + 4 + 16 = 40, so variance = 40/5 = 8 and standard deviation = sqrt(8).

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