given $a = 10% $, $b = 50%$, $c = 25%$ and $d = 15% $ calculate the variance? ( this is a made up question to make thinks clear for me)
what i have done is 1st eliminate percentages? then i calculated the variance for $a = 0.1$, $b = 0.5$, $c = 0.25$, & $0.15$
But then I was wondering, do I need to multiply by the total before getting variance? so, a would be $a = 10/100 * 4 = 0.4$, $b = 50/100 * 4 = 2$, ...... then calculate the variance.
Do I have to do it in percentages or completely un-normalized form?
well, i left it in percentages