Mathematics, 16.10.2019 01:30, hrcatena

Suppose a geyser has a mean time between eruptions of 70 minutes. let the interval of time between the eruptions be normally distributed with standard deviation 18 minutes.
(a) what is the probability that a randomly selected time interval between eruptions is longer than 79 minutes?
(round to four decimal places as needed.)
(b) what is the probability that a random sample of 88 time intervals between eruptions has a mean longer than 79 minutes?
(round to four decimal places as needed.)
(c) what is the probability that a random sample of 27 time intervals between eruptions has a mean longer than 79 minutes?
(round to four decimal places as needed.)

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Suppose a geyser has a mean time between eruptions of 70 minutes. let the interval of time between t...