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Variance and Standard Deviation

Which measure...

Question

Which measure of dispersion has a different unit other than the unit of measurement of values?

A

Range

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B

Mean deviation

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C

Standard deviation

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D

Variance

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Solution

The correct option is D Variance
Variance is the mean of the squares of the deviations from the mean. Variance is the square of standard deviation. Therefore any unit of a given set is converted into squares at the time of calculating the variance.

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