ATTLIIVUNANOWLLDUL 2.1 E. Coli in Swimming Areas. To investigate water quality, the Columbus Aa Dispatch took water specimens at 16 Ohio State Park swimming areas in central Ohio. Those specimens were taken to laboratories and tested for E. coli, which are bacteria that can cause serious gastrointestinal problems. For reference, if a 100-milliliter specimen (about 3.3 ounces) of water contains more than 130 E. coli bacteria, it is considered unsafe. Here are the E. coli levels per 100 milliliters found by the laboratories:2 Lull ECOLI 291.0 10.9 47.0 86.0 44.0 18.9 1.0 50.0 190.4 45.7 28.5 18.9 16.0 34.0 8.6 9.6 Find the mean E. coli level. How many of the lakes have E. coli levels greater than the mean? What feature of the data explains the fact that the mean is greater than most of the observations? -. m. 1 - 141