A project manager has compiled a list of major activities that will be required to install a computer information system in her firm. The list includes estimated completion times for activities and precedence relationships. Use Table B1 and Table B2.   Activity Immediate Predecessor Estimated Times (weeks) A — 2-4-6 D A 6-8-10 E D 7-9-12 H E 2-3-5 F A 3-4-8 G F 5-7-9 B — 2-2-3 I B 2-3-6 J I 3-4-5 K J 4-5-8 C — 5-8-12 M C 1-1-1 N M 6-7-11 O N 8-9-13 End H, G, K, O         If the project is finished within 26 weeks of its start, the project manager will receive a bonus of $1,000; and if the project is finished within 27 weeks of its start, the bonus will be $500. Find the probability of each bonus. (Round Mean, Standard Deviation to 2 decimal places and Probability to 4 decimal places.)   Path Mean Std. Dev. a-d-e-h 24.33 Numeric Response1. Edit Unavailable.24.33correct. 1.35 Numeric Response2. Edit Unavailable.1.35correct. a-f-g 15.50 Numeric Response3. Edit Unavailable.15.50correct. 1.26 Numeric Response4. Edit Unavailable.1.26correct. b-i-j-k 14.83 Numeric Response5. Edit Unavailable.14.83correct. 1.013 Numeric Response6. Edit Unavailable.1.013correct. c-m-n-o 26.17 Numeric Response7. Edit Unavailable.26.17correct. 1.66 Numeric Response8. Edit Unavailable.1.66correct.      Probability ($1,000)            0.33 Numeric Response9. Edit Unavailable.0.33incorrect.   Probability ($500)            0.67

Practical Management Science
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ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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A project manager has compiled a list of major activities that will be required to install a computer information system in her firm. The list includes estimated completion times for activities and precedence relationships.
Use Table B1 and Table B2.
 

Activity Immediate
Predecessor
Estimated Times
(weeks)
A 2-4-6
D A 6-8-10
E D 7-9-12
H E 2-3-5
F A 3-4-8
G F 5-7-9
B 2-2-3
I B 2-3-6
J I 3-4-5
K J 4-5-8
C 5-8-12
M C 1-1-1
N M 6-7-11
O N 8-9-13
End H, G, K, O   
 

  
If the project is finished within 26 weeks of its start, the project manager will receive a bonus of $1,000; and if the project is finished within 27 weeks of its start, the bonus will be $500. Find the probability of each bonus. (Round Mean, Standard Deviation to 2 decimal places and Probability to 4 decimal places.)
 

Path Mean Std. Dev.
a-d-e-h 24.33 Numeric Response1. Edit Unavailable.24.33correct. 1.35 Numeric Response2. Edit Unavailable.1.35correct.
a-f-g 15.50 Numeric Response3. Edit Unavailable.15.50correct. 1.26 Numeric Response4. Edit Unavailable.1.26correct.
b-i-j-k 14.83 Numeric Response5. Edit Unavailable.14.83correct. 1.013 Numeric Response6. Edit Unavailable.1.013correct.
c-m-n-o 26.17 Numeric Response7. Edit Unavailable.26.17correct. 1.66 Numeric Response8. Edit Unavailable.1.66correct.
 

  
Probability ($1,000)            0.33

Numeric Response9. Edit Unavailable.0.33incorrect.
 
Probability ($500)            0.67

 

I have worked this entire spreadsheet got all things correct but the $1000 probability.  What am I doing wrong.  I need to submit these problems by 9:30 pm tonight.  I submitted another question because there is something I am doing wrong with the probability calcs.

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