Results of testing for the presence of pollutants in a local stream have a mean of 10 mg/l and a standard deviation of 2 mg/l. Six samples of water collected from the stream result in the following measurements: 12.7, 15.1, 9.5, 13.7, 19.6, and 16.4 mg/l. Does the level of pollutants in the stream exceed the original finding of 10 mg/l? Use @ =0.01