Statistical Sampling Techniques

A TV show host asks his viewers to visit his website and respond to an online poll.

What type of sample is this?

• Simple random sampling

• Stratified random sampling

• Cluster random sampling

• None of the above

Each student at a school has a student identification number. Counselors have a computer generate 50 random identification numbers, and the students associated with those numbers are asked to take a survey.

What type of sample is this?

• Simple random sampling

• Systematic random sampling

• Cluster random sampling

• None of the above

A large company surveys 100 employees by taking random samples of 10 managers and 90 non-managerial employees.

What type of sample is this?

• Simple random sampling

• Systematic random sampling X

• Stratified random sampling

• Cluster random sampling

A support hotline asks callers to stay on the line after they have completed their call to respond to a short survey.

What type of sample is this?

• Simple random sampling

• Systematic random sampling

• Stratified random sampling

• None of the above

Mrs. Trahan samples her class by selecting every third person on her class list.

Which type of sampling method is this?

• Simple random sampling

• Systematic random sampling

• Stratified random sampling

• Cluster random sampling

Imagine that a local clothing manufacturer has 2,700 employees. The personnel manager decides to ask the employees for suggestions on how to improve their workplace. It would take too long to survey everyone, so the manager chooses to systematically sample 300 of the employees. What would be the sample interval,k?

• 0.111

• 300

• 9

• 10

Which of the following is NOT part of the sampling design process?

• Refining the research question.

• Defining of the population of the study.

• Determining the relevant sample frame.

• Selection of the sampling technique.

• Specifying the sampling unit.

What is the least expensive and least time-consuming of all sampling techniques?

• Simple random sampling.

• Stratified sampling.

• Convenience sampling.

• Judgmental sampling.

• Snowball sampling.

Which of the following are NOT criteria for the selection of stratification variables in stratified sampling?

• The strata should be mutually exclusive and collectively exhaustive so that every population element should be assigned to one and only one stratum.

• Across the strata, the elements should be as heterogeneous as possible.

• Elements within a stratum should be as homogeneous as possible.

• Stratifications variables should not be closely related to the characteristic of interest.

• Stratification variables should be easy to measure and apply.

What are the distinguishing features of simple random sampling?

• Random numbers determine which elements are included in the sample.

• Each element in the population has a known and equal probability of selection.

• A sampling frame must be compiled in which each element has a unique identification number.

• Each possible sample of a given size has a known and equal probability of being the sample actually selected.

• All of the above.