Question

For ungrouped data, Arithmetic mean by Assumed Mean Method =

• A. sX / N
• B. A + sd/N
• C. sfX / sf
• D. None

Answer 1

The correct option is B A + sd/N

In assumed mean method, any value can be taken as assumed mean whether it is there in the data or not but it should be centrally located in the data so that to simply the big figures in the data in order to ascertain mean of the given data through easy calculations. For ungrouped data, the formula for assumed mean is A+ sd/N where A is the assumed mean, sd is the summation of X-A for all figures and N is the frequency or the number of element in the given data.