While the covariance between stocks can take on a negative value, a correlation coefficient must be positive, or at a minimum, zero

A recommended way of increasing self-esteem is to

A) tell others to like you. B) become aware of your strengths and accomplishments. C) avoid listening to negative feedback. D) engage in stress-reduction activities.

Which of the following would be considered a prevention cost of quality?

A) inspecting incoming raw materials B) training workers to perform their jobs C) issuing a recall of defective product before another customer is injured D) performing a 24 hour burn-in on every item produced to make sure it works before it is shipped.