Frequency Distribution of Data
Last updated at May 29, 2023 by Teachoo
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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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
