Question

sigma(fixi-xbar) is equal to ______​

Answer 1

Answer:

The answer is 0

Step-by-step explanation:

Let total number of observation = n

Given mean of n observations  = X

then (x1 +x2 +x3 +......+xn )/n = X

 => x1 +x2 +x3 +......+xn  = n*X

Now ∑ (xi - X) = {(x1 -X) + (x2 -X) + (x3 -X)+......+(xn -X)} - n*X

                   = (x1 +x2 +x3 +......+xn ) - n*X

                   = n*X - n*X

                   = 0

So ∑ (xi - X) = 0