Question

if every class interval excludes the items relevant with upper limits in a series then it's called​

Answer 1

Exclusive Series.

Exclusive Series : As the names suggests, Exclusive series refers to the series in which every class interval excludes the items relevant with upper limits in a series. It is one of the types of Continuous Variables.The series such as 0-10, 10-20, 20-30, 30-40, 40-50..... is called as Exclusive Series.