Question

[dummy - to replace with video] Identify the false statement about mean deviation.

• A. It takes into account all values.
• B. It is always non-negative.
• C. It has the same unit as the observations.
• D. It can be used directly to compare two sets of data which have different units.

Answer 1

The correct option is D It can be used directly to compare two sets of data which have different units.

Mean deviation takes into account all values. Since only the absolute values of the deviations are used in calculation mean deviation, it is always non-negative. It has the same unit as that of the observations in the data. Hence, it cannot be used directly to compare two sets of data which have different units.