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

$\displaystyle \Sigma(x_i) + \Sigma(y_i)$ 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

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- Nov 16th 2012, 09:37 AMkingsolomonsgraveis this summation correct?
$\displaystyle \Sigma (x_i+y_i)$ is equal to

$\displaystyle \Sigma(x_i) + \Sigma(y_i)$ 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 - Nov 16th 2012, 11:59 AMRBowmanRe: is this summation correct?
Hi!

Yes, that's correct.