2. A study of the ages of motorcyclists killed in crashes analyzed a random selection of 150 drivers. The mean age for drivers killed in the sample was 37.1 years (data from the
Insurance Institute for Highway Safety). Assuming that o = 12.0 years, construct a 95%
confidence interval for the mean age of all motorcyclists killed in crashes.

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan

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?

A50-foot ladder is leaning against a vertical wall. if the base of the ladder is 45 feet from the base of the wall, find the angle the bottling of the ladder makes with the ground.