A teacher notices that on the last science test, some students did very well, while other students performed poorly or had grades in the middle of the pack. If she wanted to measure how "spread out" all of the scores were, which descriptive statistic could she use?
A) Median
B) Mode
C) Standard deviation
D) Mean

Question

Quizplus · Accepted Answer

Standard deviation is a measure of the spread or variability of a set of values. It quantifies the amount of variation or dispersion from the average or mean score. Therefore, it would be the best choice for measuring how spread out the scores are on the test. The median and mode are measures of central tendency, while the mean is a measure of both central tendency and variability.

A Teacher Notices That on the Last Science Test, Some