3.30 Making tablets. A pharmaceutical mariufacturer forms tablets by compressing a granular material that contains the ac tive ingredient and various fillers. The force in kilograms (kg)

applied to the tablets varies a bit, with the N(11.5, 0.2) dis tribution. The process specifications call for applying a force between 11.2 and 12.2 kg.

(a) What percent of tablets are subject to a force that meets the specifications?

(h) The manufacturer adjusts the process so that the meaia force is at the center of the specifications, /j. = 11.7 kg. The standard deviation remains 0.2 kg. What percent now meet the specifications?

Miles per gallon. In its Fuel Economy Guide for 2008 model 0^ vehicles, the Environmental Protection Agency gives data on 1152