A tutor kept track of how many students she had helped every week for a year. The range of the number of tutored students was 10 students. Which of the following is the best interpretation of this value?

The range is the difference between the largest and smallest values in a data set. So a range of 10 students means the greatest number of students helped in a week was 10 more than the smallest number. Choice D states this directly; the other choices describe the interquartile range, a percentage, or variation around the mean.

AI-written and checked against the verified answer.