An ecological group suspects lobsters are consuming dangerous levels of mercury in a region of the world. Dangerous levels of mercury are classified when they reach beyond 6.5 parts per million. A random sample of 25 lobsters region were tested and the data shown in the stemplot. Mercury Levels 2 24 2 3 14 3 58 4 02 4 56 5 5 689 6 34 6 7 12 7 01334 678 Key: 212= 2.2 parts per million Part A: What proportion of the lobsters in the sample have dangerous levels of mercury in their systems? Part B: Construct and interpret a 95% confidence interval for the mean mercury levels of the lobsters if the sample of 25 lobsters has a mean mercury level of 5.05 parts per million and standard deviation of 1.45 parts per million.

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