For variables measured at the nominal level,an appropriate measure of dispersion is
A)the range
B)the average deviation
C)the index of qualitative variation
D)the mode

Question

Quizplus · Accepted Answer

The index of qualitative variation (IQV) is a measure of dispersion appropriate for variables measured at the nominal level. The IQV takes into account the number of categories and their relative frequencies, and thus provides a more informative measure of dispersion than the range or mode. The average deviation is not appropriate for nominal-level variables as it requires a meaningful zero point for the data.

For Variables Measured at the Nominal Level,an Appropriate Measure of Dispersion