Frequency Distribution


 
 
Concept Explanation
 

Frequency Distribution

Frequency:

The number of times a particular observation occurs in a given data is called its frequency of an observation.The observation having maximum frequency is known as mode.

Illustration: In a data 7,6,5,5,4,3,2,2,5,1,3 find the frequency of 5.

Solution: Here the frequency of 5  in this data is 3.

Frequency Distribution: 

The tabular arrangement of data sharing their corresponding frequencies is called a frequency distribution. Frequency tells you how often something happened. The frequency of an observation tells you the number of times the observation occurs in the data.

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Sample Questions
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Question : 1

Given below are the marks secured by 20 students in a test. 20, 26, 49, 44, 12, 17, 22, 10, 5, 47, 33, 32, 23, 34, 45, 16, 4, 8, 21, 28. How many students are there who secured less than 20 marks ?

Right Option : A
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Question : 2

A group of 20 participants entered a quiz competition. Their scores are given in the table below. Calculate the percentage of the participants who scored more than 2 points. 

Score 0 1 2 3 4
Number of participants 3 5 7 4 1
Right Option : C
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Question : 3

Find the Frequency of class 80-100 by using the given data:

Class SizeFrequency
20-408
40-604
60-807
80-1009
100-1202
Total32
Right Option : B
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