Suppose we have data like

 

Marks of 20 students in a Math’s test

11, 4, 27, 18, 18, 3, 24, 22, 11, 22, 18, 11 , 18, 7, 29, 18, 11, 6, 29, 11

 

Here, marks range from 3 to 29

In grouped frequency distribution table ,

we take groups like 0-5, 5-10, 10-15, ………, 25-30

& find frequency in that group.

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  1. Chapter 5 Class 8 Data Handling
  2. Concept wise

Transcript

Grouped Frequency Distribution TableSuppose we have data like Marks of 20 students in a Math’s test 11, 4, 27, 18, 18, 3, 24, 22, 11, 22, 18, 11 , 18, 7, 29, 18, 11, 6, 29, 11 Here, marks range from 3 to 29 In grouped frequency distribution table, we take groups like 0-5, 5-10, 10-15, ………, 25-30 & find frequency in that group. 11, 4, 27, 18, 18, 3, 24, 22, 11, 22, 18, 11 , 18, 7, 29, 18, 11, 6, 29, 11 Here, 0-5, 5-10, 10-15, ….. are class Intervals 11, 4, 27, 18, 18, 3, 24, 22, 11, 22, 18, 11 , 18, 7, 29, 18, 11, 6, 29, 11 Here, 0-5, 5-10, 10-15, ….. are class Intervals Age of 30 people in your locality is 5, 65, 62, 48, 5, 23, 17, 40, 30, 30, 30, 51, 5, 17, 17, 39, 23, 48, 40, 65, 65, 62, 5, 5, 17, 62, 51, 23, 48, 40 Here age ranges from 5 to 62 In grouped frequency distribution table, we take groups like 0 – 10, 10 - 20, 20 – 30, … …, 60 – 70 & find frequency in that group 5, 65, 62, 48, 5, 23, 17, 40, 30, 30, 30, 51, 5, 17, 17, 39, 23, 48, 40, 65, 65, 62, 5, 5, 17, 62, 51, 23, 48, 40 Here, Width of class interval = 10 − 0 = 10

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.