Question

The mean value can be calculated from both ungrouped and grouped data.Which one do you think is more accurate?Why?

Answer 1

I think it is easy with a ungrouped to get a accurate result because in grouped data we have to do multiplication for every class there is a small possibility to make some mistake but by comparing to grouped data ungrouped data is better I think it would help you

Answer 2

Hi friend,
Barring the calculation errors mean value obtained by grouped data is accurate unlike that obtained from a un-grouped data which has raw values of observations.