Using the Beta distribution, calculate the Expected Activity Distribution $($EAD$),$ Standard Deviation and Range of Estimate Which activity has the most risk? Which activity has the less risk? Answers must be in $3$ decimal place.

Activity

P

M

O

J

$37$

$20$

$16$

K

$79$

$60$

$41$

L

$49$

$44$

$38$

M

$31$

$27$

$23$

Expected Activity Duration $($Beta Distribribution$)$

Beta Activity Standard Deviation

Range of Estimate$-$Start

Range of Estimate$-$End

$22\mathrm{.}167$

$3\mathrm{.}5$

$60\mathrm{.}00$

$53\mathrm{.}667$

$43\mathrm{.}833$

Activity J $($P $=37,$ M $=20,$ O $=16)$:

$37+4(20)+16/6=37+80+16/6=133/6=22\mathrm{.}167$

Activity K $($P $=79,$ M $=60,$ O $=41)$:

$79+4(60)+41/6=79+240+41/6=360/6=60\mathrm{.}00$

Activity L $($P $=49,$ M $=44,$ O $=38)$:

$49+4(44)+38/6=49+$

Activity M $($P $=31,$ M $=27,$ O $=23)$:

What is the expected activity Duration for Activity L$?$

A$.43\mathrm{.}667$

B$.44\mathrm{.}667$

C$.45\mathrm{.}167$

D$.43\mathrm{.}833$

What is the start range for Activity K$?$

A$.53\mathrm{.}667$

B$.60\mathrm{.}000$

C$.54\mathrm{.}333$

D$.53\mathrm{.}467$

What is the standard deviation for Activity J$?$

A$.3\mathrm{.}0$

B$.3\mathrm{.}5$

C$.3\mathrm{.}467$

D$.2\mathrm{.}667$

Which activity has the lesser risk?

A$.$ J

B$.$ K

C$.$ L

D$.$ not sure

What is the standard deviation for Activity L$?$

A$.1\mathrm{.}83$

B$.1\mathrm{.}333$

C$.2\mathrm{.}833$

D$.1\mathrm{.}833$

Which activity has the most risk?

A$.$ J

B$.$ K

C$.$ L

D$.$ not sure