In a study investigating type 2 diabetic patients' ability to make lifestyle changes,the researcher randomly selects a sample from a list of all patients diagnosed with type 2 diabetes in the United States.The researcher also selects the sample by randomly selecting patients diagnosed for 3 years or longer and those who are newly diagnosed.What sampling technique is used in this study?
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.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.Quota sampling 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 Type 2 Diabetic Patients' Ability to Make