Homework Answers
Given,
Mean = 41750
Standard deviation = 7500
A) To find P(X <= 40000)
We can find out this probability using the z table or technology.
Let's use excel for finding the probability.
Use the following excel command.
= NORM.DIST(X, mean, standard deviation, 1)
= NORM.DIST(40000, 41750, 7500, 1)
We will get, P(X <= 40000) = 0.4078
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