SOLUTION: Please help me solve: Suppose that x=time to complete a standardized test has a normal distribution with mean=84 and standard deviation=10. find the probability that it takes 1 hou
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Question 680636: Please help me solve: Suppose that x=time to complete a standardized test has a normal distribution with mean=84 and standard deviation=10. find the probability that it takes 1 hour to finish the test. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Please help me solve: Suppose that x=time to complete a standardized test has a normal distribution with mean=84 and standard deviation=10. find the probability that it takes 1 hour to finish the test.
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1 hour = 60 min
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z(60) = (60-84)/10 = -2.4
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P(x > 60 min) = P(z > -2.4) = 0.9918
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Cheers,
Stan H.
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