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Grouped Data Arithmetic Mean
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Grouped Data Arithmetic Mean
Arithmetic mean is quotient of sum of the given values by the number of the given values
Mean of grouped data is calculated by dividing the sum of all observations by the number of observations.
Arithmetic Mean () = ,
Where
x = Individual score
f = frequency
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Example: Find the mean of the following distribution:
x 2 4 7 8 13
f 3 8 8 5 6
Solution:
Calculation of arithmetic mean
x f fx
2 3 6
4 8 32
7 8 56
8 5 40
13 6 78
f = 30 fx = 212

Mean = = = 212/30 = 7.06
 
   
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