PMP Exam Prep Question of the Week


You are evaluating two projects. Project A has an expected duration of 90 days with a standard deviation of 10 days, and Project B has an expected duration of 100 days with a standard deviation of 4 days. Which statement is not true regarding these two projects?

  1. Project B is riskier than Project A because its expected duration is longer.
  2. Project A is riskier than Project B because its standard deviation is larger.
  3. The maximum possible duration of Project A estimated at a 95 percent probability is longer than Project B.
  4. Both projects have the potential to be completed within 90 days.

The correct answer is 1.

Answer A is not true; a longer duration does not necessarily indicate higher risk. Answer B is true, because a larger standard deviation indicates a riskier estimate. Answer C is also true because the maximum estimate for Project A at 95 percent probability is 110 days, whereas the maximum estimate for Project B is 108 days. Lastly, Answer D is true because the minimum estimate at 3 standard deviations for Project A is 60 days and for Project B is 88 days, so both could potentially finish within 90 days.

Related Resources
PMP Exam Prep Mobile App

Related Courses
Guided PMP Exam Prep
PMP Exam Prep Boot Camp
PMP Renewal Program

In this article

Join the Conversation