Contact a manager of a local business. Determine the average arrival rate and average service rate at one of these operations: a fast-food restaurant, supermarket, post office, or bank branch.

a. For the arrival rate, observe for 15 one-minute intervals. Count the number of arrivals in each minute. Construct a frequency distribution for arrivals. Does it resemble a Poisson distribution? Calculate its mean.

b. Now determine the service durations. To do this, observe the service time of 15 customers (e.g., how many minutes a teller at a bank spent with each customer). Make a frequency distribution. Does it look like exponential distribution? Calculate its mean.