Exhibit 6-5: Indicate your choice of statistics for solving the following questions.
-Refer to Exhibit 6-5.We want to know how spread out or heterogeneous the scores of a class are.
A) mean
B) standard deviation
C) z-score
D) Pearson's r

Question

Quizplus · Accepted Answer

The standard deviation is the most appropriate statistic for measuring the spread or heterogeneity of scores in a class. It measures the average distance of scores from the mean, and therefore provides an indication of how widely scores are distributed around the central tendency. The mean and z-scores are measures of central tendency and are not useful for measuring variability, while Pearson's r is a measure of correlation between two variables and is not relevant for this question.

Exhibit 6-5: Indicate Your Choice of Statistics for Solving the Following