Marks obtained by 50 students in sociology are as below :
38, 58, 24, 60, 24, 27, 56, 22, 57, 32, 40, 36, 50, 48, 28, 29, 53, 27, 52, 24, 42, 32, 21, 44, 20, 33, 51, 30,
44, 26, 54, 25, 36, 32, 45, 39, 49, 26, 41, 56, 35, 28, 34, 28, 38, 43, 37, 41, 31, 45.
Compute the class interval, tally marks and frequency of class using 10 class intervals.
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Total number of values =50
Range = Highest value − Lowest value
=98−8=90
Let us divide the given data into 10 classes.
∴ Length of the Class interval =
Number of class interval
Range
=
10
90
=10
The frequency table of the marks obtained by 50 students in a mathematics test is as follows.
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