Find interval between eruptions has mean longer

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Reference no: EM13142920

The most famous geyser in the world is, old faithful in yellowstone national park, has a mean time between eruptions of 85 minutes. If the interval between eruptions is normally ditributed with a standard deviation or 21.25 minutes, answer the following questions what is the probabilty that a random sample of 20 time interval between eruptions has a mean longer than 95 minutes?

Reference no: EM13142920

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