If the range of scores in a distribution were equal to 48 and you placed the scores within ten groups,what interval size should be used?
A)4.8
B)5.0
C)10
D)4.0

Question

Quizplus · Accepted Answer

To find the interval size, we divide the range of scores by the number of groups:

Interval size = Range of scores / Number of groups

In this case, the range of scores is 48 and the number of groups is 10.

Interval size = 48 / 10 = 4.8

Therefore, the best choice is option B) 5.0, since interval sizes are usually rounded to the nearest whole number for ease of interpretation.

If the Range of Scores in a Distribution Were Equal