A manufacturer of personal computers tests competing brands

Last updated: 7/29/2022

A manufacturer of personal computers tests competing brands and finds that the amount of energy they require is normally distributed with a mean of 285 kwh and a standard deviation of 9.1 kwh. If the lowest 25 percent and the highest 30 percent are not included in a second round of tests, what are the upper and lower limits for the energy amounts of the remaining computers? Multiple Choice [269.76, 300.24] [278.86, 289.78] [280.22, 289.78] [280.22, 300.24]