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Q. A measure of dispersion is an average of

Q. Range =-----

Q. ---- is the half distance between the third and first quartiles

Q. ----- is defined as the reciprocal of the mean of the reciprocal of these values

Q. A measure of skewness is only the difference between 2-------

Q. Measures of dispersion are called averages of ----- order

Q. ----- is the difference between highest and lowest values in a series

Q. ----- is not capable of algebraic treatment

Q. ----- is not affected by extreme items

Q. Important use of Index numbers is for