Question

What needs to be done for calculating mean for a continuous series?

• A. Mid-points of various class intervals are taken
• B. Lower class limits are taken
• C. Upper class limits are taken
• D. A or B or C

Answer 1

The correct option is A Mid-points of various class intervals are taken

To calculate the mean of a continuous series, mid points of the various class intervals is taken. For example, if the class is like 10-20 then before calculating the mean mid point that is 15 is calculated for the whole series which is added and divided by the number of terms in order to ascertain the mean.