While calculating the mean of a given data by the assumed-mean method,the following values were obtained:
A=25, ∑fidi=110,∑fi=50.
Find the mean.
Mean=25+(110/50) =25+2.2 =27.2
In the formula ¯x=A+∑fidi∑fi , the A stands for assumed mean.
In the formula Mean=a+∑fidi∑fi , the a stands for assumed mean.