Answer :

We need to find the mean by assumed mean method.

For assumed-mean method, we assume a mean from the midpoints and calculate deviation from that assumed mean.


We can create a table showing frequencies, midpoints and deviations.



So, we have


∑fixi = 9080


∑fi = 90


Observe that, we have taken assumed mean as 100. Assumed mean is a mid-value usually from the xi’s.


Here, di is the deviation from the mean.


Using xi’s and A, we have found di and further have found out fidi.


We have the following formula to calculate arithmetic mean using assumed-mean method,



Substituting all the values from the table into the formula, we get





Mean = 200.89


Thus, the mean of the data is 200.89.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

Let us find the mWest Bengal Board - Mathematics

The mean of frequWest Bengal Board - Mathematics

Let us find the mWest Bengal Board - Mathematics

Let us find the mWest Bengal Board - Mathematics

Let us find the mWest Bengal Board - Mathematics

Let us see the agWest Bengal Board - Mathematics

Mohidul has writtWest Bengal Board - Mathematics

Let us find the mWest Bengal Board - Mathematics

If the mean of nuWest Bengal Board - Mathematics

If the arithmeticWest Bengal Board - Mathematics