Question

Write the upper limit and lower limit of class 21 – 25.

Answer 1

Hint: First we define the concept of the class. Then we discuss the limits they are made of. After that, the differences between them are discussed. Then the relation between the two classes is also considered. Thereafter we find the solution to the problem.

Complete step-by-step answer:
Here we have been given a class boundary of the frequency table. Now the starting value of the class is indicated as the lower-class limit.
The ending value of the class is denoted by the upper-class limit.
The value of the lower-class limit is always lower than the upper-class limit.
Also, we need to remember that the upper-class limit of a class will be equal to the lower-class limit of the very next class.
We also need to remember that the distance or modulus difference between upper and lower-class limits is called the width of the frequency chart.
The lower-class limit and the upper-class limit of every class will be different.
In our given class of 21 – 25, the lower-class limit is 21.
The upper-class limit is 25.

Hence, the upper-class limit is 25 and the lower-class limit is 21.

Note: If the class is given in a frequency table then we need to recheck whether the class limit or the class-intervals are given. The endings of the classes are needed to be interconnected. Then we need to find the lower-class limit of the class. The average of all lower-class limits of the data sample is called lower-class boundary and the average of all upper-class limits is called upper-class boundary.