When set at the standard position, autopitch can throw hard balls toward a batter at an average speed of 60 mph. autopitch devices are made for both major- and minor-league teams to them improve their batting averages. autopitch executives take samples of 10 autopitch devices at a time to monitor these devices and to maintain the highest quality. the average range is 3 mph. using control-chart techniques; determine control-chart limits for averages and ranges for autopitch.

Which of the statements best describes why the aggregate demand curve is downward sloping? an increase in the aggregate price level causes consumer and investment spending to fall, because consumer purchasing power decreases and money demand increases. as the aggregate price level increases, consumer expectations about the future change. as the aggregate price level decreases, the stock of existing physical capital increases. as a good's price increases, holding all else constant, the good's quantity demanded decreases.