Frequency table is a table which records the lists of items and uses the tally marks and shows us the number of times they occur. Here, each item contains its own particular frequency and each frequency are distributed with an interval between them. In simple words, a tabular display of frequency distribution is called as frequency table.
There are two types of frequency table:

Univariate Frequency Table:

In univariate frequency table, the frequency distributions are displayed as the lists ordered by quantity showing the number of times each value occurs.

Example: If we have a class of 10 students and asked them their favorite subject, then the univariate frequency table is displayed as follows:

Subject  Number of students 
 Maths  2
 Science  3
 Social  1
 English  4

Joint Frequency Table:

In Joint frequency table, the frequency distributions are displayed in two-way table. The total row and the total displays the marginal frequencies, while the body of the table displays the joint frequencies.

  Dance   TV   
Sports  Total 
Men   4  8  10 22 
 Women  5  12  8  25
 Total  9  20  18  47

In statistics, for arranging the large amount of data, the data is grouped into different classes, so that, we get a clear idea of the distribution. And, the range of such class of data id is called as the class intervals.

Class intervals are equal in width and are mutually exclusive. The ends of the class interval are called as class limits, the middle of the interval is a class mark. And, these are generally used to draw histogram.


Height(in cm)   Number of students
 146 - 150  2
 150 - 155  3
 155 - 160  5
 160 - 165  7
 165 - 170  6
 170 - 175  2

In the table above, height of 25 students of a class are divided into classes with the size of each class interval being 5.