Question

What is class interval???
class 8

this is not a points giveaway
so, answer correctly ​

Answer 1

the size of each class into which a range of a variable is divided, as represented by the divisions of a histogram or bar chart.

Answer 2

The class interval is the difference between the upper class limit and the lower class limit. For example, the size of the class interval for the first class is 30 – 21 = 9. Similarly, the size of the class interval for the second class is 40 – 31 = 9.