While computing mean of grouped data, we assume that the frequencies are
A. evenly distributed over all the classes
B. centred at the classmarks of the classes
C. centred at the upper limits of the classes
D. centred at the lower limits of the classes
Answer:B
While computing mean of grouped data, we assume that the frequencies are
A. evenly distributed over all the classes B. centred at the classmarks of the classes C. centred at the upper limits of the classes D. centred at the lower limits of the classes