a past exam just trying to figure out how ti do this question

11. (25 points) An experiment to determine the concentration in ppm of Cuat in tap water with two methods gave the following results: Trial ppm Trial 1 Trial 2 Trial 3 Trial 4 5 Mean S Method 1 3.43 3.41 3.42 3.44 3.48 3.436 0.027 Method 2 3.41 3.35 3.42 3:46 3.47 3.422 0.048 A) Can the data point 3.35 ppm from Method 2 be eliminated at the 95% confidence level? Show your work B) If the EPA sets a limit of 3.25 ppm as the limit for of Cult in drinking water, is the mean measured by Method 1 greater than the EPA limit as a 95% confidence level (show all work)