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  • Given below is a cumulative frequency distribution showing the marks secured by 50 students of a class : Marks Below 20 Below 40 Below 60 Below  80Below 100 Number of students17 22 29 37 50 Form the frequency distribution table for the data

Given below is a cumulative frequency distribution showing the marks secured by 50 students of a class :

Marks Below 20 Below 40 Below 60 Below  80 Below 100
Number of students 17 22 29 37 50

Form the frequency distribution table for the data

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Solution.     Frequency distribution: It tells how frequencies are distributed overvalues in a frequency distribution. However mostly we use frequency distribution to summarize categorical variables.

Marks Number of students CF f
0- 20 17 17
20- 40 22 22-17 = 5
40- 60 29 29 -22 = 7
60- 80 37 37-29 = 8
80-100 50 50 -37 = 13

 

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