Question 1

What process is employed when a researcher accrues a sample of participants by using the word-of-mouth approach?

Accepted Answer

The answer of What process is employed when a researcher...

Question 2

A nurse researcher opts to use a stratified sample in a research study for which reason?

Accepted Answer

Stratified sampling is used when the population is heterogeneous and can be divided into subsets that are homogeneous for a particular trait or feature. This helps to ensure that the sample is representative of the entire population and that all subgroups are adequately represented in the sample. Therefore, A is the correct answer. B, C, and D are not applicable to the concept of stratified sampling.

Question 3

What question should a research consumer ask when evaluating the sample size in a research report?

Accepted Answer

The sample size is important in determining the generalizability of the study's findings to the target population. A larger sample size increases the likelihood that the results obtained accurately reflect the population under investigation. Therefore, research consumers should ask about the representativeness of the sample in relation to the target population. The other options are not relevant to evaluating the sample size.

Question 4

The nurse researcher is attempting to develop a purposive sampling strategy as part of a research study.What criteria will be used to determine whether the strategy is purposive?

Accepted Answer

The answer of The nurse researcher is attempting to develop...

Question 5

The nurse researcher is deciding on a sampling strategy for the research study.Which type(s)of strategies would be considered to be probability sampling strategies?

Accepted Answer

The answer of The nurse researcher is deciding on a...

Question 6

Which statement regarding sample size is most accurate?

Accepted Answer

Studies with larger sample sizes are more likely to be representative of the target population because a larger sample size reduces the potential for bias and chance variation. While it may be possible to achieve accurate results with smaller sample sizes, they are more susceptible to errors and outliers.

Question 7

What are types of nonprobability of sampling?

Accepted Answer

Purposive sampling involves selecting participants based on specific criteria that are relevant to the research question. Quota sampling involves setting quotas for certain demographic categories and selecting participants until the quotas are filled. Convenience sampling involves selecting participants who are easily accessible and available to participate. These types of nonprobability sampling may be appropriate when the population of interest is difficult to define or access, or when resources are limited. However, they also introduce potential biases into the sample and may limit the generalizability of the findings.

Question 8

What does the technique of matching in a sampling strategy contribute to the research?

Accepted Answer

Matching in a sampling strategy contributes to the research by increasing the equivalency of the comparison groups. This helps to reduce the potential for confounding variables, leading to more accurate and valid results.

Question 9

The primary characteristic of a probability sample is considered to be what?

Accepted Answer

The primary characteristic of a probability sample is random selection of the sample, meaning every member of the population has an equal chance of being selected for the sample. This ensures that the sample is representative of the larger population, and allows for statistically valid generalizations to be made about the population based on the sample data. Self-selection or handpicking participants can introduce bias into the sample, making it less likely to be representative of the population. Representation of proportional segments of the population is a related concept, but is a consequence rather than a primary characteristic of using probability sampling methods.

Question 10

A nurse researcher should be particularly concerned about having a small sample size for which reason?

Accepted Answer

A small sample size increases the risk of obtaining a nonrepresentative sample, meaning that the results may not be generalizable to the larger population. This is particularly concerning for nurse researchers who are attempting to draw conclusions about healthcare practices and interventions.

Question 11

Which of the following terms describes the process of obtaining the required number of participants by asking those people who are easiest to access?

Accepted Answer

Convenience sampling is the process of obtaining the required number of participants by asking those people who are easiest to access. This method can introduce selection bias, as the sample may not be representative of the larger population. Randomization is a method of ensuring that the sample is representative, and internal reliability refers to the consistency of results within a study.

Question 12

Which type of sampling is most at risk for sample bias?

Accepted Answer

Convenience sampling is the most at risk for sample bias because participants are chosen based on their ease of accessibility rather than representing the target population. This can result in a sample that is not truly representative and may lead to inaccurate conclusions.

Question 13

A nurse researcher can most accurately use the technique of power analysis to do what?

Accepted Answer

Power analysis is used to estimate the required sample size for a study based on the study's statistical power, the effect size, and the level of significance to be used.

Quiz 12: Sampling