Question

For the study described below, identify the sample.

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) All emergency-room nurses in the U.S.

B) The questionnaire given to the 275 emergency-room nurses interviewed

C) The average stress rating for the 275 emergency-room nurses interviewed

D) The 275 emergency-room nurses interviewed

Math