The number of major earthquakes (7.0 or higher) per year worldwide is assumed to bea Poisson random variable with mean 20. 1. Find the probability that at least 2 major earthquakes occur in the monthof May. (Assume for simplicity that all months have the same number of days, andthat the likelihood of a major earthquake does not vary by month.) 2. Determine the standard deviation of the number of earthquakes that willoccur during the remainder of this year (May 1st - December 31st). (Assume forsimplicity that all months have the same number of days, and that the likelihoodof a major earthquake does not vary by month.)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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Chapter11: Data Analysis And Probability
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The number of major earthquakes (7.0 or higher) per year worldwide is assumed to be
a Poisson random variable with mean 20.

1. Find the probability that at least 2 major earthquakes occur in the month
of May. (Assume for simplicity that all months have the same number of days, and
that the likelihood of a major earthquake does not vary by month.)

2. Determine the standard deviation of the number of earthquakes that will
occur during the remainder of this year (May 1st - December 31st). (Assume for
simplicity that all months have the same number of days, and that the likelihood
of a major earthquake does not vary by month.)

 

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