Dr.Thomas wants to know how similar or diverse the scores in his data set are.The most useful measure of variation for him to use is
A) the range.
B) the standard deviation.
C) a correlation coefficient.
D) the mean.

Question

Quizplus · Accepted Answer

The standard deviation is the most appropriate measure for determining the extent of variation in a data set as it is a measure of how spread out the scores are from the mean. The range only gives the difference between the highest and lowest scores, the mean does not measure the variation but only the central tendency, and a correlation coefficient measures the strength and direction of the relationship between two variables, not the variation within one variable.

DrThomas Wants to Know How Similar or Diverse the Scores