Sample/practice exam 17 December 2016, questions PDF

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Practice questions
Topic: Sampling
Note: Some answers can be found online at https://quizlet.com/133491820/research-methods-part-ii-flash-cards/...

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Sampling Multiple Choice 1. Non-probability sampling a. always produces samples that possess distorted characteristics relative to the population b. denies the researcher the use of statistical theory to estimate the probability of correct inferences c. should never be used under any circumstances d. includes stratified sampling e. requires the use of sampling frames 2. You are doing research on hospital personnel—orderlies, technicians, nurses, and doctors. You want to be sure you draw a sample that has cases in each of the personnel categories. You want to use probability sampling. An appropriate strategy would be a. b. c. d. e.

simple random sampling quota sampling cluster sampling stratified sampling accidental sampling

3. Stratifying a population prior to drawing a sample a. generally occurs when the variables used to stratify are known to be associated with the dependent variable b. eliminates the need for simple random sampling c. is most useful for studying a homogeneous population d. eliminates the need for probability sampling e. is an alternative to systematic sampling 4. The chief aim of sampling is to be able to select a. b. c. d. e.

simple random samples a sample whose statistics will accurately portray an unknown population parameter a sample whose parameters will accurately portray an unknown population statistic a sample whose statistics will accurately portray a known population parameter a sample whose unknown statistics will accurately portray a known parameter

5. A sampling interval of 5 was used to select a sample from a population of 1000. How many elements are to be in the sample? a. b. c. d. e.

5 50 100 200 1000

6. Probability samples are advantageous to the researcher because a. b. c. d. e.

the method by which they are selected limits conscious and unconscious sampling bias the accuracy or representativeness of the sample can be estimated they are perfectly representative of the population from which they are drawn all of the above only a and b are correct

7. You want to examine the relationship between family size and family cohesion. You use as your sample all the students in your research methods class. What kind of sampling design are you using? a. b. c. d. e.

simple random sampling quota sampling cluster sampling stratified sampling reliance on available subjects

8. A summary description of a given variable in a survey sample is called a a. b. c. d. e.

variable parameter confidence level confidence interval statistic

9. Every Kth element in a list is chosen for inclusion in the sample in a. b. c. d. e.

simple random sampling systematic sampling disproportionate sampling cluster sampling stratified sampling

10. Statistical computations assume that you have done a. b. c. d. e.

simple random sampling systematic sampling cluster sampling stratified sampling any one of the above is assumed

Short Answer 1.

You are surprised by how many professional football players get arrested for drug offences and are interested in studying their attitudes toward the use of controlled substances. Describe in detail how you would employ either simple random sampling, stratified sampling, or cluster sampling to derive a broadly representative sample of National Football League players.

2.

A friend of your is interested in assessing Canadian undergraduate students’ attitudes toward cheating and has decided to survey the students in her Art History class. Explain to your friend why her strategy is inappropriate and describe a better sampling strategy given her purposes.

3.

What is meant by the term “probability sampling”? In what research circumstance(s) is it important and why?...