Organisation of Grouped Data

In a grouped frequency distribution, the class width must be _____ .

In a grouped frequency distribution, the classes should be mutually _____.

State the characteristics of data representation of grouped frequency distribution.

Class intervals in a grouped frequency are given as $4‐11, 12‐19, 20‐27, 28‐35, 36‐43$. What are the class marks of each class?

Find the size of the class interval:
$$\begin{gathered} 200 - 220 \\ 220 - 240 \\ 240 - 260 \\ 260 - 280 \end{gathered}$$

Find the size of the class interval in the following caes.
$0 - 10$
$10 - 20$
$20 - 30$
$30 - 40$

Find the size of the class interval.

Write the midpoint or class mark and class limits of $25-27.$

Find the class interval of $0-\mathrm{5,5}-\mathrm{10,10}-\mathrm{15,15}-20.$

* The question given in the textbook is Incorrect, so the modified question is as follow

Find the size of the class intervals :$0-5,5-10,10-15,15-20.$

The difference between the lower and upper limits of a class interval is called

 In a set of data, the lowest and the highest values are $15$ and $66$ respectively. Construct overlapping class intervals with the following class width.

$10$

In the following table, find:

the class width of the intervals

The class mark for a class interval $10-20$ is