Points scored 17 19 12 23 15 10 21 consider the number of points hailey scored in the last seven volleyball matches of the season. find the interquartile range of the scores. a) 4 b) 6 c) 9 d) 13 answer asap pleas

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?