Determining the probability using mean and standard deviation. Attachments in Word.

A wildlife biologist captures geese and weighs them. He determines that the weights are normally distributed with a mean of 9 pounds and a standard deviation of 1.3 pounds. What is the probability that a goose captured at random will weigh more than 11 pounds?

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... x2 = 11

We have that:

Z1 = (8-9)/1.3 = -0.77

Z2 = (11-9)/1.3 = 1.54

Then Pr(8<X<11) ...