document.write( "Question 60219: A statistics professor finds that when she schedules an office hour for student help, an average of two students arrive. fidn the probability that in a randomly selected office hour, the number of student arrivals is five. give the answer as a decimal value with 4 places of precision, and no leading 0. \n" ); document.write( "

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A statistics professor finds that when she schedules an office hour for student help, an average of two students arrive. fidn the probability that in a randomly selected office hour, the number of student arrivals is five. give the answer as a decimal value with 4 places of precision, and no leading 0.
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\n" ); document.write( "It's a Poisson problem.
\n" ); document.write( "Expected number(m) to arrive in one hour is two.
\n" ); document.write( "Formula: P(X=k)=[m^x/x!]e^(-m)
\n" ); document.write( "In your problem k=5 :
\n" ); document.write( "P(X=5)=[2^5/5!]e^(-2)=0.0361
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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