Please reference the figure below for the following questions. From Activity A t

Question

Please reference the figure below for the following questions.

From Activity A to Activity F, how many chains of activities are there?

Select one:

a. 1

b. 2

c. 3

d. 4

PART 2

What are the mean duration and standard deviation of each chain?

Chain

Mean Duration (day)

Standard Deviation (day)

ABDF

ABEF

ACEF

Select one:

a.

Chain

Mean Duration (day)

Standard Deviation (day)

ABDF

19

3.87

ABEF

26

3.87

ACEF

23

3.46

b.

Chain

Mean Duration (day)

Standard Deviation (day)

ABDF

11

1.87

ABEF

21

1.7

ACEF

29

2.46

c.

Chain

Mean Duration (day)

Standard Deviation (day)

ABDF

15

2.87

ABEF

16

3.00

ACEF

12

2.9

PART 3

What is the probability that the project is finished less than 25 days?

Select one:

a. 21%

b. 27%

c. 25%

d. 29%

Chain

Mean Duration (day)

Standard Deviation (day)

ABDF

ABEF

ACEF

Activity Te 15

Explanation / Answer

1)

there are three chains

ABDF,ACEF,ABEF,ACEBDF

2) TO FIND OUT OUT THE mean duration of each chain we just add up the mean value

and for sd we first find the variance by squaring sd's then add those variances and take sqrt of it

our answer is a

3)

answer is .25 .......(the prob is 1/4 one chain among 4 chains )

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