A hospital-billing auditor has been inspecting patient bills. While almost all bills contain some errors, the auditor is looking now for large errors (errors in excess of $250). Among the last 100 bills inspected, the defect rate has been 14%. Calculate the upper and lower limits for the billing process for 99.7% confidence.

Defect Rate

The percentage of products or services that fail to meet quality standards out of the total produced or delivered.

Confidence

A person's belief in their own abilities or in the likelihood of a positive outcome.

Billing Process

A systematic procedure that involves issuing invoices to customers for goods or services provided, tracking payments received, and following up on past due payments.