Which of the Following Statements Regarding PERT Analysis Is NOT

Multiple Choice

Which of the following statements regarding PERT analysis is NOT true?

A) Each activity has three estimates of its duration.
B) Project variance is the sum of all critical activity variances.
C) Project standard deviation is the sum of all critical activity standard deviations.
D) Only critical activities contribute to the project variance.
E) The most likely time is different from the expected activity time.