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Time estimates Expected Variance Activity Optimistic Most Likely Pessimistic Time (ET) (6²) m 40 50 60 31 a b A 31 49 B 44 56 C 48 72 D 22 34 Assume each time estimate consists of one data point Start A B D End 2) What is the estimated Standard Deviation in the time for activity C? (Round to the nearest whole number) A. 0 days B. 4 days C. 9 days D. 10 days E. 33 days

Time estimates Expected Variance Activity Optimistic Most Likely Pessimistic Time (ET) (6²) m 40 50 60 31 a b A 31 49 B 44 56 C 48 72 D 22 34 Assume each time estimate consists of one data point Start A B D End 2) What is the estimated Standard Deviation in the time for activity C? (Round to the nearest whole number) A. 0 days B. 4 days C. 9 days D. 10 days E. 33 days

Practical Management Science
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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Time estimates Expected Variance Activity Optimistic Most Likely Pessimistic Time (ET) (0²) a A 31 B 44 C 48 72 D 22 34 Assume each time estimate consists of one data point Start m 40 50 60 31 b 49 56 B D End 2) What is the estimated Standard Deviation in the time for activity C? (Round to the nearest whole number) A. 0 days B. 4 days C. 9 days D. 10 days E. 33 days
Transcribed Image Text:Time estimates Expected Variance Activity Optimistic Most Likely Pessimistic Time (ET) (0²) a A 31 B 44 C 48 72 D 22 34 Assume each time estimate consists of one data point Start m 40 50 60 31 b 49 56 B D End 2) What is the estimated Standard Deviation in the time for activity C? (Round to the nearest whole number) A. 0 days B. 4 days C. 9 days D. 10 days E. 33 days
Expert Solution
Step 1

Formulae used: 

Expected time is (E)= (O + 4M + P)6.

Variance (σ2)=P-O62

Standard Deviation=σ2

Where,

(O)=Optimistic Time

(M)=Most likely Time

(P)= Pessimistic time 

 

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