Question

Value of fx is 300,A=35,no. If observations are 15 and width of class interval is 5 then arithmetic mean is

Answer 1

Answer:

20 or 55 (depends on assumptions)

Explanation:

Summation fx = 300

Assumed Mean (A) = 35

N = 15

i = 5

Mean = summation fx / N = 300/15 = 20

(as in the question, it is mentioned "fx" it is assumed that assumed mean deducted from it, if it was deducted it should be writen as "fy", not x, any other variable instead of x)

if it is assumed that , fx is the deducted result from A. then

Mean = A + summation fx /N × i = 35 + 300/15×5

= 35+ 25 = 55.