Jim has gotten scores of 93 and 63 on his first two tests. what score must he get on his third test to keep an
average of 80 or greater?

The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine. (a) compute the z-score corresponding to the individual who obtained 42.342.3 miles per gallon. interpret this result.