Frequency Distribution
Frequency Distribution
Frequency Distribution:
Frequency table or frequency distribution is a method to present raw data in the form, from which on can easily understand the information contained in the raw data. Frequency distributions are of two types:
Discrete Frequency Distribution :
The process of preparing this type of distribution is very simple. The construction of a discrete frequency distribution from the given raw data is done by the use of the method of tally marks. In the first column of the frequency table we write all possible values of the variable from the lowest to the highest.
Illustration : Draw a discrete frequency distribution of the number of children in 20 families: 1,1,2,3,4,3,2,1,1,4,5,2,4,2,2,1,3,3,2,5
Solution : The data may be put in the form of a discrete frequency distribution as follows:
|
No. of children |
Tally bars |
Frequency |
| 1 |  |
5 |
| 2 |  |
6 |
| 3 | IIII | 4 |
| 4 | III | 3 |
| 5 | II | 2 |
Find the frequency of Class 20-40 by using the given data:
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| Right Option : B | |||||||||||||||||
| View Explanation | |||||||||||||||||
The table shows the distribution of marks in an English test. Grade B is given to marks ranging from 40 to 54. Calculate the percentage of pupils who obtained a grade B.
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| Right Option : C | |||||||||||||||||
| View Explanation | |||||||||||||||||
Find the frequency of Class 100-120 by using the given data:
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| Right Option : C | |||||||||||||||||
| View Explanation | |||||||||||||||||
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