In a study investigating nurses' attitudes toward taking care of respiratory disease patients who had a long history of smoking, the researcher randomly selected a sample from a list of all the registered nurses from a randomly selected list of four states in the Southeast. If the researcher also selected the sample by randomly selecting nurses who smoke and those who do not, what sampling technique is being used?
A) Cluster
B) Quota
C) Stratified random
D) Systematic

Question

Quizplus · Accepted Answer

Stratified random sampling is used when certain characteristics of the group are identified and then proportionately included in the randomly chosen sample. Assuming the researcher first knew whether or not a nurse smoked, then this represents that sampling technique.
In cluster sampling, a researcher develops a sampling frame that includes a list of all the possible elements of the identified population, and those are randomly selected. Then the sample is randomly selected from those groups.
This is a type of convenience sampling in which a predetermined number of subjects is drawn from groups within the population to ensure appropriate representation.
Systematic sampling is selecting every kth individual from a listing of the population.

In a Study Investigating Nurses' Attitudes Toward Taking Care of Respiratory