A machine is employed to fill containers with the liquid product. Fill volume can be supposed to be normally distributed. A random sample of 10 containers is chosen, and the contents (oz) are as follows: 12.03, 12.01, 12.04, 12.02, 12.05, 11.98, 11.96, 12.02, 12.05, and 11.99. Assume that the manufacturer wants to be sure that the mean net contents exceeds 12 oz. What conclusions can be drawn from the data (use a = 0.05)?