The Greek physician who discovered that arteries carry blood, not air, as had been previously thought, was ______

A mental patient involuntarily admitted to a mental hospital may refuse treatment if he or she

a. can provide a good reason. b. is willing to post a bond. c. doesn't agree that he or she is mentally ill d. is competent to give informed consent.

Researchers use descriptive statistics when they want to ________

a. draw inferences about how statistically meaningful a study's results are. b. organize and summarize research data. c. combine and analyze data from many studies. d. assess how likely it is that a study's results occurred merely by chance.