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Question

Which measure of dispersion ensures lowest degree of reliability?

A
Range
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B
Mean deviation
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C
Quartile deviation
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D
Standard deviation
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Solution

The correct option is A Range

Range is defined as the difference between the highest(or largest ) and lowest(or smallest) observed value in a series. It is the most affected measures of dispersion by the extreme values of the series therefore it has the lowest degree of reliability.


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