PSY 124

Identifying Sampling Methods

1. What are the differences between a simple random sampling and stratified random sampling?

1. What are the differences between a snowball sample, a cluster sample, and a convenience sample?

1. Compare and contrast quota sampling with stratified random sampling.

1. A sample of 2,000 was sought to estimate the average achievement in science of fifth graders in a city's public schools. The average fifth grade enrollment in the city's elementary schools is 100 students. Thus, 20 schools were randomly selected and within each of those schools all fifth graders were tested. Describe what sampling method was used and why.

1. A researcher is interested in maximum-security inmates. She wants the same proportion of inmates across the type of crime committed (robbery, assault, and murder) in her sample as in the actual prison population. Describe what sampling method she should use and how she should carry out her sampling.

1. Imagine you are a research and you are interested in knowing what study techniques your students are utilizing. How would you obtain your sample (Hint: There isn't one correct answer to this question).

1. Say you wanted to survey professors at UINDY about their publication records. You want to be sure to include professors from each department, even the very small ones.

How would you obtain your sample? (Hint: There isn't one correct answer to this question).