When asked to make recommendations on how to correct any deficiencies noted in the exit report, the auditor(s) should

Which of the following are likely to be positive actions in obtaining a supplier's commitment to quality improvement?
I. Involving the supplier early in the product development stage.
II. Partially reimbursing the supplier, when the product is rejected.
III. Establishing a firm schedule of required product quantities and dates.
IV. Providing meaningful and timely quality performance feedback.

A process has been experiencing problems lately. The operators charting the process have identified the cause to be due to a change in incoming materials. This problem is

A "p" chart

Which of the following is a valid null hypothesis?