A project is expected to be completed in 16 days. The variance of the project duration is 3 days.

(8 points)
a. What is the probability that it will be completed in 18 days?
b. What is the probability that it will take more than 19 days to finish?
c. What is the probability that it will be completed within 16 days?
d. What is the due date that yields 80 % chance of completion?

Z = (score-mean)/SD

SD = sq rt of variance

Look in the back of your statistics textbook for a table called something like “area under normal distribution” to find the proportion/probability.