A teacher notices that,on the last science test,some students did very well while other students performed poorly or had grades somewhere in the middle.If she wanted to measure how "spread out" the scores were,which descriptive statistic could she use?
A)median
B)mode
C)standard deviation
D)mean

Question

Quizplus · Accepted Answer

The standard deviation is a measure of dispersion or spread of data around the mean. It tells you how far apart the data is from the average. In the case of the teacher's science test, she can use the standard deviation to determine how spread out the scores were among the students. A high standard deviation indicates that there is a large spread of scores, while a low standard deviation indicates that the scores are closer together. The median, mode, and mean are measures of central tendency, which tell you where the center of the data is, but they do not give any information about how spread out the data is.

A Teacher Notices That,on the Last Science Test,some Students Did