Question: (1) Water samples from a particular site demonstrate a mean coliform level of 10 organisms per liter with standard deviation 2.Values vary according to a

(1) Water samples from a particular site demonstrate a mean coliform level of 10 organisms per liter with standard deviation 2.Values vary according to a Normal distribution.What percentage of samples will contain more than 15 organisms?

(2) Question 1 addressed coliform levels in water samples from a particular site.The coliform levels were assumed to vary according to Normal distribution with a mean of 10 organisms per liter and a standard deviation of 2 organisms per liter.What is the 90th percentile on this distribution?

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