Project Management Professional (PMP) Exam Practice – Question1973 Calculate the standard deviation for the following: Pessimistic=50, Optimistic=10, Realistic=24. A. 26 B. Not enough information C. 5.67 D. 6.667 Show Answer Hide Answer Correct Answer: D Post navigation Project Management Professional (PMP) Exam Practice – Question1972Project Management Professional (PMP) Exam Practice – Question1974