Table $9\mathrm{.}5$

Expected Times and Variances for the Porta$-$Vac Project Activities

A

Expected

Time $($weeks$)$

$6$

$2$

$3$

$5$

$3$

$2$

$3$

$4$

$2$

$\frac{2}{32}$

Variance

$1\mathrm{.}78$

$0\mathrm{.}44$

$0\mathrm{.}11$

$1\mathrm{.}78$

$0\mathrm{.}11$

$0\mathrm{.}03$

$0\mathrm{.}25$

$0\mathrm{.}69$

$0\mathrm{.}03$

J

$0\mathrm{.}11$