After implementation of the computerized system, a random sample of 500 invoices showed 479 invoices with 0 errors, 10 invoices with 1 error, 8 invoices with 2 errors, 2 invoices with 3 errors, and 1 invoice with more than 3 errors.

Tasks:

Create appropriate null and alternative hypotheses.

Justify the appropriate chi-square test to determine whether the error percentages for the computerized system differ from the normal system.