A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola is 40 milligrams. You want t
o test this claim. During your tests, you find that a random sample of thirty 12-ounce bottles of cola has a mean caffeine content of 42.3 milligrams. Assume the population is normally distributed and the population standard deviation is 7.1 milligrams. At alphaequals0.04, can you reject the company's claim