Activity Z has estimates a = 5,b = 12,m = 7;activity X has estimates a = 5,b = 11,m = 6;and activity Y has estimates a = 3,b = 11,m = 8.Which of the following statements is BEST?
A)Activity X is longer than Activity Y.
B)Activity X has a higher standard deviation than Activity Z.
C)Activity Z is shorter than Activity Y.
D)Activity Y has a smaller variance than Activity Z.

Question

Quizplus · Accepted Answer

Activity Z has the lowest estimated time (7), followed by Activity X (6) and Activity Y (8). Therefore, Activity Z is the shortest and Activity Y is the longest. We cannot determine the standard deviation or variance from the given information.

Activity Z Has Estimates a = 5,b = 12,m =