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MCQ
The standard deviation of the data 4, 8, 12, 16 is approximately:
Unit-11 Basic Statistics
A 4.47
B 5
C 6.32
D 20
Explanation

Mean = 10; sum of squared deviations = 36 + 4 + 4 + 36 = 80; variance = 80/4 = 20; standard deviation = sqrt(20) ≈ 4.47.

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