You can drag and drop files here to add them. Time left 1:36:4 A recent study by the EPA has determined that the amount of contaminants in Minnesota lakes (in parts per million) is normally distributed with mean 64 ppm and variance 17.6. Suppose 35 lakes are randomly selected and sampled. What is the probability that the sample average amount of contaminants is: (a) Above 72 ppm? (b) Between 64 and 72 ppm? (c) Exactly 64 ppm? (d) Above 94 ppm? (4+2+2+2=10 Marks) A BI