SOLUTION: The ages of students in an elementary school building are uniformly distributed between 5 and 11. Find the probability that a randomly selected student is at least 9 years old.

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Question 912451: The ages of students in an elementary school building are uniformly distributed between 5 and 11.
Find the probability that a randomly selected student is at least 9 years old. Round your answer to three decimal places.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
m = 8, sd = 2.16
p(x ≥ 9) = 1 - P(x < 9) = 1 - P(z < 1/2.16) = 1 - .6783 = .3217 0r 32.17%