In a certain accounting office, workers have been processing 60 tax returns per day on average with a standard deviation of 10.2. The office introduced a new protocol in order to see if there would be any significant change in the average number of returns processed per day. For a random sample of 200 worker-days, the average was 58. What is the probability of a type II error if the actual average number of returns processed per day is 58 based on a sample of 200?