SOLUTION: Suppose a geyser has a mean time between eruptions of 74 min. If the interval time between eruptions is normally distributed with standard deviation 20 min whatbis probability that

Question 947489: Suppose a geyser has a mean time between eruptions of 74 min. If the interval time between eruptions is normally distributed with standard deviation 20 min whatbis probability that a randomly selected time interval is longer than 83min.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Suppose a geyser has a mean time between eruptions of 74 min. If the interval time between eruptions is normally distributed with standard deviation 20 min whatbis probability that a randomly selected time interval is longer than 83min.
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z(83) = (83-74)/20 = 9/20
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P(x > 83) = P(z > 9/20) = normalcdf(9/20,100) = 0.3264
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Cheers,
Stan H.
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