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  • The following table shows the cumulative frequency distribution of marks of 800 students in an examinationMarks Number of students Below 10 Below 20 Below 30 Below 40 Below 50 Below 60 Below 70 Below 80 Below 90 Below 100 10 50 130 270440570670740780 800

The following table shows the cumulative frequency distribution of marks of 800 students in an examination:               

Marks Number of students
Below 10
Below 20
Below 30
Below 40
Below 50
Below 60
Below 70
Below 80
Below 90
Below 100		 10
50
130
270
440
570
670
740
780
800

Construct a frequency distribution table for the data above.

Answers (1)

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

Marks cf f
0-10 10 10
10-20 50 50-10=40
20-30 130 130-50=80
30-40 270 270-130=140
40-50 440 440-270=170
50-60 570 570-440=130
60-70 670 670-570=100
70-80 740 740-670=70
80-90 780 780-740=40
90-100 800 800-780=20

 

Posted by

infoexpert27

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