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Q.

For  200 observations of a specific set of data, the mean was found to be 48 and the standard deviations is 3. Sum of squares of these 200 observations will be

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a

462000

b

462600

c

482600

d

462800

answer is B.

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Detailed Solution

Given that the mean is 48 Hence, ∑xi200=48  The Variance is 9 Hence ∑xi2200−∑xi2002=9⇒∑xi2200=9+(48)2⇒∑xi2=462600
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