If you select a number of participants for a study of how often they eat out at fast-food restaurants, and you make your selection so that you have an equal representation of people from each of 5 income levels, this constitutes: A. Biased sample B. Stratified sample C. Random sample D. Population

Which of the following is an example of stratified sampling? A poll asked a random sample of 1,327 adults whether they supported stronger gun control measures. A sample of 37 people who came to speak before the city council on the proposed water conservation plan were surveyed. The human resources department of a large retail chain wanted to assess the job satisfaction of the retail workers. The department chose 25 of the company's stores at random, and used all of the workers in those 25 branches as the subjects for the study. In order to assess public attitudes on good nutrition the the first 40 people to leave a large grocery store were interviewed. Proponents of a local ballot measure conduct a survey of the city by randomly selecting 100 potential voters from each of its 18 zip codes.

A researcher wants to study the average eating patterns of American workers. They publicize their survey through an email list for Ivy League business school graduates. What can be said about this sample?a.)This is a concomitant sample.b.)This is a generalized sample.c.)This is a biased sample.d.)This is a representative sample.

Which of the following is an example of stratified sampling?   A sample of 150 people called the campus radio show to express their opinions about the food establishment on campus.   In order to assess student satisfaction with the food establishment on campus, 100 students from each of the schools on campus were randomly selected (100 business, 100 fine arts, 100 humanities, 100 sciences, and 100 technology) for a total of 500 sampled students.   In order for a city to find out if drivers text while driving, 15 blocks within the city were randomly selected and all the residents on those blocks were interviewed.   A health educator wanted to study the sleeping habits of the undergraduate students in her university. For her study, the researcher chose a simple random sample of 600 students to interview.   The human resources department of a large bank wanted to assess the job satisfaction of the bank's workers. The department interviewed 50 workers in the breakroom during a week of morning breaks.

Selection bias occurs when ______.Multiple Choicethose responding to a survey or poll differ systematically from the nonrespondentsthe population has been divided into stratacluster sampling is used instead of stratified random samplingportions of the population are excluded from the consideration for the sample

Which of the following are examples of sampling bias? Select all that apply. 1 分A clinical study includes three times more men than women. An election poll only interviews people with college degrees.A teacher gives higher grades to essays written in their own writing style.A survey of students does not include homeschooled students.