Steve is conducting research on police officers.He is only interested in officers in the "middle ages" of their careers,so not rookie officers and not those nearing retirement.How might he pair down his sample to the officers he's interested in?
A)standard deviation.
B)mean.
C)interquartile range.
D)median.
E)mode.

Question

Quizplus · Accepted Answer

The interquartile range (IQR) is a measure of variability that shows the spread of the middle 50% of the data. By calculating the IQR of the ages of all police officers and narrowing his sample to officers within this range, Steve can isolate the "middle-aged" officers he is interested in studying.

Steve Is Conducting Research on Police Officers