=+15. Central Airlines would like to set up a control chart to monitor its on-time arrival performance. Each day over a 10-day period, Central Airlines chose 30 flights at random and tracked the number of late arrivals in each sample.

The results are as follows:

DAY SAMPLE SIZE NUMBER OF LATE-ARRIVING FLIGHTS 1 30 2 2 30 3 3 30 4 4 30 0 5 30 1 6 30 6 7 30 4 8 30 2 9 30 3 10 30 5

a. (*) Calculate p.