Solve the Problem. -For the Study Described Below, Identify the Population Parameter. a Population

Multiple Choice

Solve the problem.
-For the study described below, identify the population parameter. A researcher is interested in the level of stress among emergency-room nurses in the U.S. 275 emergency-room nurses were interviewed to determine their level of stress. Each nurse was assigned a stress rating based on his or her answers to a number of questions. The average stress rating for the 275 nurses was determined.

A) The average stress rating for the 275 emergency-room nurses interviewed
B) The average stress rating for all emergency-room nurses in the U.S.
C) All emergency-room nurses in the U.S.
D) The average stress rating for all emergency-room nurses in the world