# Math Help - is this summation correct?

1. ## 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

2. ## Re: is this summation correct?

Hi!

Yes, that's correct.