# is this summation correct?

• November 16th 2012, 10:37 AM
kingsolomonsgrave
is this summation correct?
$\Sigma (x_i+y_i)$ is equal to

$\Sigma(x_i) + \Sigma(y_i)$ is equal to

Xbar times n plus Ybar times n which is equal to

n(Xbar+Ybar)

where 'Xbar' and 'Ybar' are the sample average
• November 16th 2012, 12:59 PM
RBowman
Re: is this summation correct?
Hi!

Yes, that's correct.