The age of a sample has been measured in years. Which of the following would be the preferred measure of the variation for this variable?
A) The index of qualitative variation
B) The average deviation
C) The quartile deviation
D) The standard deviation

Question

Quizplus · Accepted Answer

The standard deviation is the preferred measure of variation for quantitative data, such as age measured in years. The index of qualitative variation is used for categorical data, the average deviation is less robust and sensitive to outliers, and the quartile deviation only considers the middle 50% of the data.

The Age of a Sample Has Been Measured in Years