In a certain population of fish, the lengths of individual fish are approximately normally distribut

In a certain population of fish, the lengths of individual fish are approximately normally distributed with a mean of 54.0 mm and a standard deviation of 4.5 mm

If one fish is selected at random, what is the probability that its length will be greater than 60 mm?

If four fish were selected at random, what is the probability that the mean of this sample will be greater than 60 mm?
sanchez12
Asked Dec 16, 2012

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