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Standard Deviation and Variance for a Path

This test is much more challenging than what you will (most likely) find on the PMP Exam and your time is better spent studying other tasks. 

However, if you are up to the challenge these questions are based on the equations above.

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Question 1 of 4

You are managing a project to rebuild a bridge over the River Nile in Egypt.  There are four activities left on the critical path. Activity A has a duration uncertainty of 30 days.  Activity B has a duration uncertainty of 24 days.   Activity C has a duration uncertainty of 12 days.  Activity D has a duration uncertainty of 12 days. What is our Standard Deviation for each activity? (A,B,C,D)

A

A : 30, B : 24, C : 12, D : 12

B

A : 7.5, B : 6, C : 3, C : 3

C

A : 5, B : 4, C : 2, D : 2

D

A : 25, B : 16, C : 4, D : 4

Question 2 of 4

You are managing a project to rebuild a bridge over the River Nile in Egypt.  There are four activities left on the critical path. Activity A has a duration uncertainty of 30 days.  Activity B has a duration uncertainty of 24 days.   Activity C has a duration uncertainty of 12 days.  Activity D has a duration uncertainty of 12 days. What is the Variance for the whole Path?

A

47 Days

B

48 Days

C

49 Days

D

50 Days

Question 3 of 4

You are managing a project to rebuild a bridge over the River Nile in Egypt.  There are four activities left on the critical path. Activity A has a duration uncertainty of 30 days.  Activity B has a duration uncertainty of 24 days.   Activity C has a duration uncertainty of 12 days.  Activity D has a duration uncertainty of 12 days. What is the Standard Deviation of the overall remaining path?

A

6 Days

B

6.23 Days

C

6.85 Days

D

7 Days

Question 4 of 4

You are managing a project to rebuild a bridge over the River Nile in Egypt.  There are four activities left on the critical path. Activity A has a duration uncertainty of 30 days.  Activity B has a duration uncertainty of 24 days.   Activity C has a duration uncertainty of 12 days.  Activity D has a duration uncertainty of 12 days.    Assume calculations are based on +/- 3 standard deviations. What is the duration uncertainty of the overall remaining path? 

A

36 Days

B

37.38 Days

C

41.1 Days

D

42 Days

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