The class-length of the class-intervals 1-4,5-8,………is

Define: class-interval

The class width of the class interval 133-139 is...a) 3 b) 5 c) 6 d) 4

The width of the class interval 40-50 is

Find the class-marks of the class interval 10-25.

The class size of the class interval 60 - 68 is 8.

Class width of any class interval is ,

The width of the class interval 20- 30 is

The mid-value of a class-interval of a frequency distribution is 10 and the class-length of each class is 6, The lower class limit of the class-interval is

The class-mark and class-length of a class-interval are 22 and 10 respectively.Find its lower and upper class-boundaries.

The class mark of the class interval 4.7-6.3 is _______.