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Question

The sum of n observations is 100 and the sum of squares of these n observations is 500. Then which of the following is a possible value of n?


Your Answer
A
17
Your Answer
B
19
Correct Answer
C
21
Your Answer
D
18

Solution

The correct option is C 21
The variance is always non-negative.
σ20x2n(¯¯¯x)20500n(100n)20500n100000n20

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