George collected achievement score data for each child from a middle school. He has their gender, age, teacher and score on the achievement measure as his data fields.
-George also needs to calculate the measure of variation for achievement score. Which measure should he use?
A) Standard deviation
B) Range
C) Mean
D) Quartile deviation

Question

Quizplus · Accepted Answer

Standard deviation is a measure of dispersion that takes into account the variability of data from the mean. It is a more precise measure of variation than range and quartile deviation. Therefore, it is the best choice for calculating the measure of variation for achievement score.

George Collected Achievement Score Data for Each Child from a Middle