Question

A tidal wave or tsunami is usually the result of an earthquake in the Pacific Rim, often 1000 or more miles from Hawaii. Tsunamis are rare but dangerous. Many tsunamis are small and do little damage. However, a tsunami nine meters or higher is very dangerous. Civil Defense authorities sound an alarm telling people near the beach to go to higher ground. About 30% of all recorded tsunamis have been nine meters or higher. You are writing a report about seven recent earthquakes in the Pacific Rim and you want to include a brief statistical profile of some possible events regarding tsunamis in Hawaii. Let r be the number of tsunamis nine meters or higher resulting from seven randomly chosen earthquakes in the Pacific Rim. (b) What is the probability none of the tsunamis are nine meters or higher? (Round your answer to three decimal places.) (c) What is the probability at least one is nine meters or higher? (Round your answer to three decimal places.) (d) What is the expected number of tsunamis nine meters or higher? (Round your answer to two decimal places.) (e) What is the standard deviation of the r-probability distribution? (Round your answer to three decimal places.)

          A tidal wave or tsunami is usually the result of an earthquake
in the Pacific Rim, often 1000 or more miles from Hawaii. Tsunamis
are rare but dangerous. Many tsunamis are small and do little
damage. However, a tsunami nine meters or higher is very dangerous.
Civil Defense authorities sound an alarm telling people near the
beach to go to higher ground. About 30% of all recorded tsunamis
have been nine meters or higher. You are writing a report about
seven recent earthquakes in the Pacific Rim and you want to include
a brief statistical profile of some possible events regarding
tsunamis in Hawaii. Let r be the number of tsunamis nine meters or
higher resulting from seven randomly chosen earthquakes in the
Pacific Rim. (b) What is the probability none of the tsunamis are
nine meters or higher? (Round your answer to three decimal places.)
(c) What is the probability at least one is nine meters or higher?
(Round your answer to three decimal places.) (d) What is the
expected number of tsunamis nine meters or higher? (Round your
answer to two decimal places.) (e) What is the standard
deviation of the r-probability distribution? (Round your answer to
three decimal places.)

Added by Michael M.

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