Question

62.
The arithmetic mean of the squared deviations of respective data in a data set from the mean of
the data is named
(a) Standard deviation
(b) Variance
(c) Quartile deviation
(d) Range​

Answer 1

A range is the most common and easily understandable measure of dispersion. It is the difference between two extreme observations of the data set. If X max and X min are the two extreme observations then

Range = X max – X min