Question

While computing the mean of the groue data, we assume that the frequencies are 

(a) evenly distributed over the classes 

(b) centred at the class marks of the classes 

(c) centred at the lower limits of the classes 

(d) centred at the upper limits of the classes

Answer 1

Correct answer is (c) centred at the lower limits of the classes 

While computing the mean of the group data, we assume that the frequencies are centred at the class marks of the classes.