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 |
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 | |||||||||||||||||
The frequency table shows the marks obtained by a group of students in a monthly test. Calculate the percentage of students who failed the test if 40 is the passing mark.
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| Right Option : D | |||||||||||||||
| View Explanation | |||||||||||||||
The number of times a particular observation occurs in a given data is called ________________ | |||
| Right Option : B | |||
| View Explanation | |||
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