The average time it takes students to get to school each day is 20 minutes. Dr. Mazza conducts a study and from a sample of 20 students, she finds that the average time it takes students is 24 minutes with a standard deviation of 2 minutes. Which testing model would you use to test the hypothesis? a. z-test b. p-test c. r-test d. t-test

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?