The personality type associated with being hardworking, scheduled, and impatient is a Type __________ personality

Dr. Harris conducts an experiment on psychophysics using participants above age 65. These participants would constitute the ________ of the study.

A. population B. world C. sample D. subsample

The more hours that students work, the less suc- cessful they are academically. This is an example of what type of correlation?

a. zero b. positive c. perfect d. negative