20 POINTS The heights of the students at a particular high school are normally distributed. 68% of the heights are between 59 inches and 71 inches. What are the mean and standard deviation for this data? Group of answer choices mean [ Choose ] standard deviation [ Choose ]

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?