Select the sample most representative of the population of interest
-An employer wanted to determine the importance of health insurance as a benefit to employees. Which sample is likely to be unbiased by personal interest?
A) A group of 30 employees from the company who had medical treatment in the past year
B) A survey of 300 union members conducted by the union that represents workers at the company.
C) A group of thirty potential employees at the state office of employment
D) All of the groups in A, B, and C have potential bias.

Question

Quizplus · Accepted Answer

All of the groups have potential bias because they are not representative of the entire population of employees. Group A is biased because it only includes employees who have had medical treatment in the past year, which means that it is more likely to include employees who are concerned about health insurance. Group B is biased because it is conducted by the union, which represents workers at the company, which means that it is more likely to include employees who are in favor of health insurance. Group C is biased because it only includes potential employees, which means that it is more likely to include employees who are not currently employed and may not be aware of the importance of health insurance.

Select the Sample Most Representative of the Population of Interest