Question

Dr. Searcy was entering grades for the last summative test into his gradebook. Here are the scores.

90, 88, 95, 98, 85, 82, 92, 75, 82, 65, 97, 85

What is the range? And explain it.

Answer 1

The range of a set of data is the difference between the highest and lowest values. In this case, the highest value is 98 and the lowest value is 65, so the range is 98-65 = 33. This means that the scores on the test ranged from 65 to 98, a difference of 33 points.

The range is a measure of the spread of the data. In this case, the range is relatively large, which means that the scores were spread out over a wide range of values. This suggests that the test was challenging and that there was a wide range of student abilities.