Computation of a mean (or average)is completely justified when a variable is measured at which level?
A)interval-ratio
B)ordinal
C)nominal
D)discrete

Question

Quizplus · Accepted Answer

Computing a mean is only appropriate for variables measured at the interval-ratio level since measures at this level have meaningful distances between values and a true zero point. The mean is the sum of all values divided by the total number of values and utilizes the actual numerical value of the variable. Variables measured at the ordinal, nominal, or discrete level do not possess this type of numerical value and cannot be meaningfully averaged using the mean.

Computation of a Mean (Or Average)is Completely Justified When a Variable