Completion time (from start to finish)of a building remodelling project is normally distributed with a mean of 200 work-days and a standard deviation of 10 work-days.The probability that the project will be completed within 185 work-days is ___.
A)0.0668
B)0.4332
C)0.5000
D)0.9332
E)0.9950

Question

Quizplus · Accepted Answer

To find the probability that the project will be completed within 185 work-days, we calculate the Z-score: Z = (185 - 200) / 10 = -1.5. Using the standard normal distribution table, the probability corresponding to Z = -1.5 is approximately 0.0668.

Completion Time (From Start to Finish)of a Building Remodelling Project