Dr.Cirella measures the throwing distance of a group of Grade 8 students,and finds that the average distance for the boys is greater than that for the girls.If he also wanted to know how much the scores vary within each group,what statistic should he use?
A) mean
B) standard deviation
C) correlation coefficient
D) probability statistic

Question

Quizplus · Accepted Answer

To measure the variation within each group, Dr. Cirella should use the standard deviation. The standard deviation measures the amount of dispersion or spread of a set of data around its mean. It tells us how much the individual scores deviate from the average. This will help him to understand the degree of variability within each group and compare the variability between the two groups.

DrCirella Measures the Throwing Distance of a Group of Grade