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A public opinion polling agency surveyed...

A public opinion polling agency surveyed 200 government empolyees . The following table shows the ages of the empolyees interviewed.

(i) Calculate the mean age of empolyees interviewed.
(ii) Compute the mean deviation of the ages about the mean age.

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The correct Answer is:
(i) `=36.5`
(ii) `=6.65`
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