Many frequency distributions use intervals to group data.For example,the in class exam scores ranged from 90-60 and the professor wants to have at least 6 groupings.What should be the interval?
A)6
B)5
C)7
D)None of these

Question

Quizplus · Accepted Answer

To have at least 6 groupings, we can divide the range of scores (90-60 = 30) by 5 to get an interval of 6. This means that the first interval would be 60-65, the second would be 66-71, and so on up to the last interval of 86-90. This would give us 6 intervals of equal width, each containing 5 score points. Therefore, the best choice is B with an interval of 5.

Many Frequency Distributions Use Intervals to Group Data