Question

In the formula x=a+(∑f_(id_i ) )/∑f_i , finding the mean of the grouped data, di’s are deviations from assumed mean ‘a’ of


a.lower limits of classes. b.upper limits of classes.
c.class mark. d.frequencues of the classes.​

Answer 1

Answer:

This method is called Deviation method.

£f_i is sum of the frequecies of the class.

so (d) option is correct.

Answer 2

Answer:(D). frequencues of the classes.

l hope it will help you

please make me brainleast