In a given score distribution of 19, 21, 23, 25 and 27, the sum of the square deviations is
The mean is (19 + 21 + 23 + 25 + 27)/5 = 23. The squared deviations sum to (−4)² + (−2)² + 0² + 2² + 4² = 16 + 4 + 0 + 4 + 16 = 40.
Choose your answer
In a given score distribution of 19, 21, 23, 25 and 27, the sum of the square deviations is
Answer and explanation
Correct answer C
The mean is (19 + 21 + 23 + 25 + 27)/5 = 23. The squared deviations sum to (−4)² + (−2)² + 0² + 2² + 4² = 16 + 4 + 0 + 4 + 16 = 40.
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West Bengal SET (WB SET)