Measures of variability are used to
A)describe the extent to which scores in a distribution differ from one another.
B)describe the extent to which scores in a distribution differ from the extreme scores.
C)make appropriate decisions regarding graph size,shape,and style.
D)describe measures of central tendency.

Question

Quizplus · Accepted Answer

Variability measures such as range, variance, and standard deviation are used to describe how spread out or dispersed scores are in a distribution, indicating the degree of difference between scores. Option B is incorrect as it specifically refers to extreme scores, while variability measures consider all scores in the distribution. Option C is incorrect as it refers to graphing decisions, which are not directly related to variability measures. Option D is incorrect as measures of central tendency (such as mean, median, and mode) describe the central or typical value of a distribution, not the degree of variability.

Measures of Variability Are Used to