The allowance for sampling risk was

a. 5 1/2%

b. 4 1/2%

c. 3 1/2%

d. 1%

An auditor desired to test credit approval on 10,000 sales invoices processed during the year. The auditor designed a statistical sample that would provide 1% risk of assessing control risk too low (99% confidence) that not more than 7%
of the sales invoices lacked approval. The auditor estimated from previous experience that about 2 1/2% of the sales invoices lacked approval. A sample of 200 invoices was examined and 7 of them were lacking approval. The auditor then determined the achieved upper precision limit to be 8%.