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

Answers (1)

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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