A grouped frequency distribution table with classes of equal sizes u sin g 105 − 120
(120 not included) as one of the class interval is constructed for the following data :
125 126 140 98 128 78 108 67
87 149 102 136 145 112 103 87
123 130 120 89 103 65 96 65
The number of classes in the distribution will be
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60-75=1st Interval
75-90=2nd Interval
90-105=3rd Interval
105-120=4th Interval
120-135=5th Interval
135-150=6th Interval
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Given:
A grouped frequency distribution table with classes of equal sizes 105 − 120.
Raw data:125 126 140 98 128 78 108 67
87 149 102 136 145 112 103 87
123 130 120 89 103 65 96 65
To Find:
The number of classes in the distribution ?
Step-by-step explanation:
- Since,from the given data we can observe heightest observation is 145
and lowest observation is 65. and also gap of interval is 15.
- Thus
60-75=1st Interval
75-90=2nd Interval
90-105=3rd Interval
105-120=4th Interval
120-135=5th Interval
135-150=6th Interval
Hence, total of 6 class distribution.
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