Question

calculate the mean age using assumed mean method:a=40

Answer 1

Mean
$= a + \frac{summation \: \: fidi}{summation \: fi}.$




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Answer 2

Answer:

The mean of the grouped frequency distribution is calculate by:

Mean is calculate by formula using:

Mean = A + $\frac{\sum fd}{n} h$

where A is the assumed mean

d is the difference of observation from the Assumed mean

h is the class width.