Question

In the above assumed mean method, (statistics), how to find the value of A (as given in the table)
How did A be 57 in this question?

Can someone pls explain? ​

Answer 1

Answer:

from the formula of mean is x bar sigma fi × di upon sigma fi

Answer 2

Answer:

always midle number of xi row will be "A" in assumed mean method.

hope this answer helpful