During a university registration period, 10 students every hour are sampled and asked about satisfaction with the services the university provided. Twelve different groups of students were sampled, and the number in each group who had complaints are as follows: 0, 2, 1, 0, 0, 1, 3, 0, 1, 2, 2, 0. Develop upper and lower control limits ( 99.7%) for the proportion of students with complaints.
