🔎 Need parentheses when squaring σ

Don’t forget to use parentheses when squaring things!

E	F	G	H	I	J	K
$W_{Bills}$	$W_{Index}$	Expected Return	Wrong Variance	Formula	Variance	Formula
$0$	$1$	$0.11$	$0.1089$	=F6*$B$6^2	$0.1089$	=(F6*$B$6)^2
$0.2$	$0.8$	$0.0940$	$0.0871$	=F7*$B$6^2	$0.0697$	=(F7*$B$6)^2
$0.4$	$0.6$	$0.0780$	$0.0653$	=F8*$B$6^2	$0.0392$	=(F8*$B$6)^2
$0.6$	$0.4$	$0.0620$	$0.0436$	=F9*$B$6^2	$0.0174$	=(F9*$B$6)^2
$0.8$	$0.2$	$0.0460$	$0.0218$	=F10*$B$6^2	$0.0044$	=(F10*$B$6)^2
$1$	$0$	$0.0300$	$0.0000$	=F11*$B$6^2	$0.0000$	=(F11*$B$6)^2

Exponentiation (ie ^) has a high precedence, above multiplication, in “order of operations,” so this is required.