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Exam 11: Sampling

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Question 1

Multiple Choice

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How is a two-stage cluster different from a one-stage cluster?

A) A one-stage cluster just chooses clusters and a two-stage cluster chooses a sample from every selected cluster.
B) A one-stage cluster is for 1-9 clusters, a two-stage cluster is for 10+ clusters.
C) A two-stage cluster just chooses clusters and a one-stage cluster chooses a sample from every selected cluster.
D) A one-stage cluster is for one researcher, a two-stage cluster is for studies where there are multiple researchers.

E) B) and C)
F) C) and D)

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Question 2

Multiple Choice

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______ sampling involves the researcher selecting the first person to be in the sample based on a random starting point and then selecting the remainder of the sample based on a fixed sampling interval.

A) Random
B) Systematic random
C) Stratified
D) Cluster

E) C) and D)
F) All of the above

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Question 3

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Which type of sampling is best used when there are few resources to conduct a study at an agency?

Which type of sampling is best to use when a sample is difficult to access?

Michael found that ice cream sales and crime rates were highly correlated to each other. Michael concluded that ice cream sales caused high crime. What mistake is Michael making?

______ sampling allows the results of a researcher's study to be generalized to the population from which the sample was drawn.

When a researcher does not acknowledge other variables that can influence a relationship between two variables, what might result?

A disadvantage of a proportional stratified sampling strategy is that you need to have incomplete data on the variable used to stratify the sample on everyone in the population.

Tarek wants to better understand the reasons people voted for the winning candidate in the 2016 presidential election. If Tarek only wants to speak to Republicans, he would be engaging in what type of sampling?

Selection ______ can reduce the validity of the inferences you want to draw from inferential statistical tests.

What are at least three factors researchers should consider when choosing a sampling method?

If the researcher wants the sample size of each subgroup to be proportional in its representation to the population, which type of stratified sampling strategy should they use?

Sampling ______ is produced by using sampling strategies that overrepresent a portion of the study population.

What is the main risk involved when using a convenience sample?

With ______ sampling, it is unknown what the chance was that an individual was selected.

Which of the following sampling methods involves representing the major characteristics of a population by sampling an equal amount of each?

A ______ sample is one that closely matches the population from which it was drawn.

Javier wants to learn about the most needed services his social work agency should offer to help those who are homeless. What type of sampling should he conduct to speak to as many people who are homeless as possible?

What kind of variable can have a hidden effect on your experiment's outcome causing you to incorrectly infer a spurious correlation?

Which step is needed to create a random sample?