Refer to the following distribution of ages: What is the class interval?
A)9
B)10
C)10.5
D)11

Question

Refer to the following distribution of ages:  What is the class interval?
A)9 
B)10 
C)10.5 
D)11

Quizplus · Accepted Answer

The class interval is the difference between the upper and lower limits of each class. Since there is no indication of decimals in the data, we can assume that the class interval is a whole number. Looking at the given data, the range of ages is from 18 to 77, a difference of 59. Dividing this range by 6 (since there are 7 classes with 6 intervals), we get 9.83, which is not a whole number. Therefore, the best choice for the class interval is the whole number 10.

Refer to the Following Distribution of Ages: What Is