The difference between the highest and the lowest scores in a given distribution is called range.
To understand the range:
consider the following set of data:
24, 52, 35, 28, 49, 21
Find out the highest and the lowest scores. Have you observed the highest scores is 52 and the lowest is 21? Take the difference of these two scores. It is 52 – 21 = 31. What is the difference called? This difference is called range.
Range is the simplest measure of dispersion. The difference between the highest and the lowest scores of distribution is called range.
Range = Highest Score (H) – Lowest Score(L)