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Solution
The correct option is B 12.17
Here to find the mean value we find the mid point for the each class interval.
Mid-point~ of 0-4 = (0+4)2 = 2; Mid-point~ of 5-9 = (5+9)2= 14 and the like.
We denote the mid-point of the class interval by x. Now we write down the frequencies f corresponding to each class interval.
Multiply f and x to get fx. Add all fx and find out ∑fx
Mean = sum of all scorestotal number of scores
Mean = 35329
= 12.17
Here to find the mean value we find the mid point for the each class interval.
Mid-point~ of 0-4 = (0+4)2 = 2; Mid-point~ of 5-9 = (5+9)2= 14 and the like.
We denote the mid-point of the class interval by x. Now we write down the frequencies f corresponding to each class interval.
Multiply f and x to get fx. Add all fx and find out ∑fx
Mean = sum of all scorestotal number of scores
Mean = 35329= 12.17
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