A project whose critical path has an estimated time of 820 days with a variance of 225 has a 20% chance that the project will be completed before day (rounded to nearest day).
A) 631
B) 689
C) 807
D) 833
E) 1009

Question

Quizplus · Accepted Answer

The Z-score for a 20% probability is approximately -0.84. Using the formula: X = μ + Zσ, where μ = 820, σ = √225 = 15, we get X = 820 + (-0.84)(15) = 807.4, rounded to 807.

A Project Whose Critical Path Has an Estimated Time of 820