Solve the below problem:
Q: Over six months a bank recorded, on a weekly basis, errors per thousand items processed in all types of collection transaction. The resulting 26 numbers were as follows: 0, 2, 0, 17, 2, 4, 0, 2, 1, 0, 0, 5, 6, 5, 15, 5, 10, 5, 2, 2, 0, 2, 0, 0, 1. The bank administration reports tha the average error rate for such transactions is 1.5%.
What is the average weekly proportion of errors