The project optimistic estimate is 10 weeks and the pessimis - PMP Prep
Question
The project optimistic estimate is 10 weeks and the pessimistic estimate is 40 weeks. What is the standard deviation of the estimate?
Answers
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correct
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Explanation
The correct answer is B.
To calculate the standard deviation using the three-point estimate method, we can use the following formula:
Standard Deviation(σ)=P−O6Standard Deviation(σ)=6P−O
Where:
- OO = Optimistic estimate (10 weeks)
- PP = Pessimistic estimate (40 weeks)
First, calculate the difference between the pessimistic and optimistic estimates:
P−O=40−10=30 weeksP−O=40−10=30 weeks
Now, substitute this value into the standard deviation formula:
σ=306=5 weeksσ=630=5 weeks
Thus, the standard deviation of the estimate is b. 5 weeks.
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