Activity P M O Expected Activity Duration $($Beta Distribution$)$ Beta Activity Standard Deviation Range of Estimate

Start End

A $452518$

B $896140$

C $474335$

THREE$-$POINT ESTIMATING:

Using the Beta Distribution, what is the standard deviation for Activity B$?$

a$.$

$6\mathrm{.}500$

b$.$

$7\mathrm{.}500$

c$.$

$8\mathrm{.}167$

d$.$

$5\mathrm{.}000$