Classes or Class Intervals

Introduction|| Collection OF Data||Primary and Secondary Data|| classes|| Class interval|| Class size ( range )|| Presentation OF Group data & Single data ( ungrouped data )||Tally mark||Frequency distribution table

Unequal Class Intervals

Class mark of class interval 60–70 is

The fourth class interval for a grouped data whose first and second class intervals are 10 -15 and 15 -20 respectively is _________

Mean Of Grouped Data (With Class Intervals)|Practice Problems

Construction of A Histogram When Mid-Points of Class-Intervals are Given

If the fifth class interval is 60 - 65, fourth class interval is 55 - 60, then the first class interval is 45-50.

The sixth class interval for a grouped data whose first two class intervals are 10 - 15 and 15 – 20 is _______.

In a frequency distribution with classes 0-10, 10-20 etc., the size of the class intervals is 10. The lower limit of fourth class is