A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola 40 milligrams. You want to te
st this claim. During your tests, you find that a random sample of thirty 12-ounce bottles of cola has a mean caffeine content of 39.2 milligrams. Assume the population is normally distributed with a standard deviation of 7.5 milligrams. At α=0.01, can you reject the company’s claim