Class width of a class interval is defined as

Class mark of a class is

The difference between the upper and lower limits of a class interval is its width. (write True or false)

Define: class-interval

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

The middle point of a class is m and the upper limit of the class interval is u ,then calculate the lower limit of the class.

The class-mark of a class interval of a frequency distribution is m and its class-length is l. Find its lower and upper class-limits.

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 mid-value of a class-interval of a frequency distribution is x and its lower -boundary is y. Then its upper -boundary=

A company manufactures car batteries of particular type. The life (in years) of 40 batteries was recorded as follows: Construct a grouped frequency distribution table with exclusive classes for this data, using class intervals of size 0.5 starting from the interval 2-2.5.

In any grouped frequency distribution class intervals are of equal width.