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Arithmetic Mean

The mean of 1...

Question

The mean of 14, 25 , 14 , 28 , 18 , 17 , 18 ,14 , 23 , 22, 14 ,18 is ___.

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17.5

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19.55

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18.75

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Solution

The correct option is D
18.75

Mean = $\frac{S u m o f o b s e r v a t i o n s}{N o . o f O b s e r v a t i o n s}$

= $\frac{14 + 25 + 14 + 28 + 18 + 17 + 18 + 14 + 23 + 22 + 14 + 18}{12}$

= $\frac{225}{12}$

= 18.75

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