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The most famous geyser in the world, Old Faithful in Yellowstone Nabonal Park, has a mean
time between eruptions of 85 minutes. If the interval of bime betw with standard deviation 21.25
minutes, complete parts (a) through (D). Click here to view the standard normal distribution lable
(page 1), Click here to view the standard normal distribution table (page 2). (a) What is the
probability that a randomly selected time interval between eruptions is longer than 95 minutes?
The probability that a randomly selected time interval is longer than 95 minutes is approximately
(Round to four decimal places as needed.) (b) What is the probability that a random sample of 11
time intervals between eruptions has a mean longer than 95 minutes? The probability that the
mean of a random sample of 11 time intervals is more than 95 minutes is approximately (Round
to four decimal places as needed.) (c) What is the probability that a random sample of 21 time
intervals between eruptions has a mean longer than 95 minutes? The probability that the mean of
a random sample of 21 time intervals is more than 95 minules is approximately (Round to four
decimal places as needed.)

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  • 1. The most famous geyser in the world, Old Faithful in Yellowstone Nabonal Park, has a mean time between eruptions of 85 minutes. If the interval of bime betw with standard deviation 21.25 minutes, complete parts (a) through (D). Click here to view the standard normal distribution lable (page 1), Click here to view the standard normal distribution table (page 2). (a) What is the probability that a randomly selected time interval between eruptions is longer than 95 minutes? The probability that a randomly selected time interval is longer than 95 minutes is approximately (Round to four decimal places as needed.) (b) What is the probability that a random sample of 11 time intervals between eruptions has a mean longer than 95 minutes? The probability that the mean of a random sample of 11 time intervals is more than 95 minutes is approximately (Round to four decimal places as needed.) (c) What is the probability that a random sample of 21 time intervals between eruptions has a mean longer than 95 minutes? The probability that the mean of a random sample of 21 time intervals is more than 95 minules is approximately (Round to four decimal places as needed.)