Find the mean of the squares of the first seven whole numbers.

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Solution

The correct option is B 13
The first 7 whole numbers are 0, 1, 2, 3, 4, 5, 6, 7.
Squares of first 7 whole numbers are 0, 1, 4, 9, 16, 25, 36.
$M e a n = \frac{s u m o f o b s e r v a t i o n s}{N u m b e r o f s t u d e n t s}$

$= \frac{(0 + 1 + 4 + 9 + 16 + 25 + 36)}{7}$

$= \frac{(91)}{7}$

$∴ M e a n = 13$

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