Q. 7 4.3( 13 Votes )

Using an appropriate method, find the mean of the following frequency distribution:

Which method did you use, and why?

Answer :

For equal class intervals, we will solve by finding mid points of these classes using direct method.

We have got

Σfi = 80 & Σfixi = 8244

mean is given by

Thus, mean is 103.05

Here, the method being used is direct method as it is easy to calculate the mid - points of the class intervals and the rest calculations were simple and easy.

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