The number of customers arriving per hour at a certain automobile service facility is assumed to follow a Poisson distribution with mean λ = 5.5. (a) Compute the probability that more than 7 customers will arrive in a 2-hour period. (b) What is the mean number of arrivals during a 2-hour period? Click here to view page 1 of the table of Poisson probability sums. Click here to view page 2 of the table of Poisson probability sums. Click here to view page 3 of the table of Poisson probability sums. (a) The probability that more than 7 customers will arrive is (Round to four decimal places as needed.) (b) The mean number of arrivals is (Type an integer or a decimal. Do not round.)

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