1. The QuickChange Co. currently uses a process that completes an oil change with a mean of 25 minutes and a standard deviation of 2 minutes. The distribution of output is normal. If service specifications call for oil change to be completed between 20 and 30 minutes, what % of current oil change service will not meet the specifications?
2. As part of an insurance companys training program, employees learn how to conduct analyses of clients insurability. The goal is to have employees achieve a completion time between 30 to 45 minutes. Test results for three employees were: Alex, a mean of 38 minutes and a standard deviation of 3 minutes: Brian, a mean of 37 minutes and a standards deviation of 2.5 minutes: Melissa, a mean of 37.5 minutes and a standard deviation of 2 minutes. Which participants would you judge to be capable? Why?