Q41Fill in the blanks
If x is the mean of n values of x, then ∑ ( xi − x ) is always equal to _______. i =1 If a has any value other than x , then ∑ ( xi − x ) is _________ than i =1 ∑ ( xi − a)2
If x is the mean of n values of x, then ∑ ( xi − x ) is always equal to _______. i =1 If a has any value other than x , then ∑ ( xi − x ) is _________ than i =1 ∑ ( xi − a)2