Problem 8 A wholesaler hag recently developed a computerized sales invoicing system. Prior to implemeting this system, a manual system was used. Historically, the manual system produced 87% of...

Extracted text: Problem 8 A wholesaler hag recently developed a computerized sales invoicing system. Prior to implemeting this system, a manual system was used. Historically, the manual system produced 87% of invoices with o errors, 8% of invoices with 1 error, 3% of invoices with 2 errors, 1% of invoices with 3 errors, and 1% of invoices with more than 3 errors. After implementation of the computerized system, a random sample of 500 invoices showed 479 invoices with o errors, 10 invoices with 1 error, 8 invoices with 2 errors, 2 invoices with 3 errors, and 1 invoice with more than 3 errors. Test to determine if the percentages of errors have changed since introducing of computer systems. 1. Write the Ho and Hi 2 Calculate the test statistics 3. What is the critical value? 4 What condlusions would you draw?