Again, working with the data in Problem 13-11, the number of cars that arrive in each 10-minute

Question:

Again, working with the data in Problem 13-11, the number of cars that arrive in each 10-minute period is another factor that will determine whether there will be the capacity to handle the drive-thru business. In addition to studying the service times, the owners also counted the number of cars that arrived at the deli in the nearby town in a sample of 10-minute time periods. These data are as follows:

Based on these data, is there evidence to conclude that the arrivals are not Poisson distributed? State the appropriate null and alternative hypotheses and test using a significance level of 0.025.