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Question

Calculate the mean for the following distribution:
x : 5 6 7 8 9
f : 4 8 14 11 3

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Solution

Calculation of Mean
xi fi fi xi
5 4 20
6 8 48
7 14 98
8 11 88
9 3 27
Total fi = 40 fixi = 281

∴ Mean = ​ fixifi = 28140 = 7.025 .

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