Question

 x¯ represents the mean of n observations x1, x2, …, xn, then value of ∑ni=1(xi−x¯) is:​

Answer 1

Answer:

0

Step-by-step explanation:

ˉ

 is the average of all the observations. If we draw all the numbers and the mean on a number line, then half of the numbers will lie on the right side of the mean and other half on the left side. Hence, (x  

i

​

−  

x

ˉ

) will give equal number of positive and negative terms whose sum will be 0.