Exam 5: Selecting Research Participants

Simple random sampling without replacement means that the likelihood of selecting one specific individual will depend on which other individuals are selected for the sample.

It is always necessary to have at least 25-30 participants in a study.

Using a simple random sample eliminates bias from the selection process.

A researcher would like to examine the political attitudes for students at a local university. The researcher will evaluate a sample of 200 students but would like to be sure that the ages and genders of individuals in the sample accurately represent the ages and genders for the entire student body at the university. What would be the best sampling method for the researcher to use?

One characteristic of random sampling with replacement is that it ____.

The most commonly used sampling methods in psychology are nonprobability sampling methods.

A cluster sample usually does not qualify as a true random sample because ____.

A researcher would like to describe and compare the attitudes of four different ethnic groups of students at a local state college. To obtain participants for the study while ensuring sufficient numbers of participants from each of the ethnic groups, the researcher should probably use ____ sampling.

The law of large numbers states that larger samples are _____.

One criticism of proportionate stratified random sampling is that ____.

A professor teaching an introductory psychology class of 200 obtains a sample of 25 students by selecting every eighth name from the class list. The professor is using ____ sampling.

Explain why you are more likely to obtain a representative sample with proportionate stratified random sampling than with either stratified random sampling or simple random sampling.

Dr. Ziser conducts an experiment on life satisfaction using participants above the age of 80. Because she cannot include all people above the age of 80, she will select what is known as a ____.

When a researcher wants a sample to accurately represent the composition of the population, the best strategy is to use stratified random sampling.

The starting point for most probability sampling techniques is ________.

Dr. Ziser conducts an experiment on life satisfaction using participants above the age of 80. All people above the age of 80 would make up the ____.

If the individuals in a sample have characteristics that are noticeably different from the individuals in the population, then the sample is said to be ____.

A systematic sample does not qualify as a true random sample because ____.

Stratified random sampling and quota sampling are both classified in the category of probability sampling techniques.

Although it is possible to obtain a sample with characteristics that are very different from the population through random sampling, it is more likely that a nonrepresentative sample is the result of ____.