# standard normal distribution

A project is being analyzed using PERT. The expected completion time of the project is 70 weeks with a standard deviation of 5 weeks. Assume the project completion time is normally distributed. What is the probability that the project will be finished in 74 weeks or less?

a. 0.8000

b. 0.7881

c. 0.2119

d. 0.2881

e. None of these is correct

https://brainmass.com/statistics/probability/problems-with-standard-normal-distribution-417113

#### Solution Preview

Answer: B

We can assume X to be the completion time. The standard ...

#### Solution Summary

Standard normal distribution is exemplified.

$2.19