Question

Arrivals at a walk-in optometry department in a shopping centre have been found to be Poisson distributed with a mean of 2.5 potential customers arriving per hour. Assuming that the Poisson distribution is reasonable for this situation, where X is the number of arrivals during a given hour. Calculate the probability of: i) At least 2 customers in a given hour? ii) Exactly 8 customers between 2pm and 6pm? (Note: round your numbers to 4 decimal places)

          Arrivals at a walk-in optometry department in a shopping centre have been found to be Poisson distributed with a mean of 2.5 potential customers arriving per hour. Assuming that the Poisson distribution is reasonable for this situation, where X is the number of arrivals during a given hour. Calculate the probability of:
i) At least 2 customers in a given hour?
ii) Exactly 8 customers between 2pm and 6pm?
(Note: round your numbers to 4 decimal places)

Arrivals at a walk-in optometry department in a shopping centre have been found to be Poisson distributed with a mean of 2.5 potential customers arriving per hour. Assuming that the Poisson distribution is reasonable for this situation, where X is the number of arrivals during a given hour. Calculate the probability of:
i) At least 2 customers in a given hour?
ii) Exactly 8 customers between 2pm and 6pm?
(Note: round your numbers to 4 decimal places)

Added by Tom-S H.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

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Arrivals at a walk-in optometry department in a shopping center have been found to be Poisson distributed with a mean of 2.5 potential customers arriving per hour. Assuming that the Poisson distribution is reasonable for this situation, where X is the number of arrivals during a given hour, calculate the probability of: i) At least 2 customers in a given hour? ii) Exactly 8 customers between 2 pm and 6 pm? (Note: round your numbers to 4 decimal places)