(1 point) The EPA wants to test a randomly selected sample of n water specimens and estimate the mean daily rate of pollution produced by a mining operation. It the EPA wants a 95% confidence interval with a bound of error of 0.5 milligram per liter (mg/l), how many water specimens are required in the sample? Asam prior knowledge indicates that pollution readings in water samples taken during a day have been approximately normally distributed with a standard deviation or 4.4 (mg/L)