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Question

Calculate the mean of the following distribution:
Class Interval01010202030304040505060
Frequency 8 5 12 35 24 16

Solution
Verified by Toppr

Class Mid value (x) f fx
0-10 5 8 40
10-20 15 5 75
20-30 25 12 300
30-40 35 35 1225
40-50 45 24 1080
50-60 55 16 880
Total
1003600

Mean(¯x)=fxf
=3600100
=36.

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