Sampling

This question bank verified by Studydeets
All Questions
Filter by:
Question 1
Free
Multiple Choice

What is the process of selecting representative units of a population for study in a research investigation?

Choose correct answer/s
A

Sampling

B

Snowballing

C

Delimination

D

Random assignment

Check answer
Question 2
Free
Multiple Choice

How should a nurse researcher expect a sample to differ from a population?

Choose correct answer/s
A

A sample can mean objects or events, whereas population refers to individuals or groups of people.

B

A population has a broad set of defining characteristics, and a sample has a narrow set of defining characteristics.

C

A population is a representative segment of a defined sample.

D

A sample is a representative segment of a defined population.

Check answer
Question 3
Free
Multiple Choice

A nurse researcher has made a generalization on the basis of the experience of a small number of participants. What will the result of this be?

Choose correct answer/s
A

The small sample will invalidate the hypotheses.

B

The researcher will be unable to eliminate his or her bias.

C

The data obtained from a small number will inadequately represent the phenomenon.

D

The small number of participants will increase the threat to internal validity influenced by history.

Check answer
Question 4
Free
Multiple Choice

Which statement is most accurate regarding inclusion and exclusion criteria?

Choose correct answer/s
A

These criteria are not needed when the population being studied is composed of events.

B

These criteria serve to ensure that the characteristics of the sample and the population are congruent.

C

Inclusion criteria are used to define the independent variables, and exclusion criteria are used to define dependent variables.

D

Inclusion criteria are used to define the dependent variables, and exclusion criteria are used to define independent variables.

Check answer
Question 5
Free
Multiple Choice

What can a nurse researcher use to restrict the study population to homogeneous groups of subjects?

Choose correct answer/s
A

Sampling

B

Self-selection

C

Eligibility criteria

D

Defining study limitations

Check answer
Question 6
Multiple Choice

A nurse researcher should be concerned about establishing clear eligibility criteria for inclusion in a study sample because such criteria will do what?

Choose correct answer/s
A
Increase the homogeneity of the sample
B
Decrease the homogeneity of the sample
C
Increase the size of the sample
D
Decrease the size of the sample
To unlock the question
Question 7
Multiple Choice

A nurse researcher should attempt to clearly specify exclusion criteria for a study sample because such criteria will do what?

Choose correct answer/s
A
Limit the time needed to complete the study
B
Reduce the effect of extraneous variables on the accurate evaluation of the outcome variable
C
Eliminate the outside influences and inferences regarding the effectiveness of a behavioral intervention
D
Ensure that an adequate sample size is accrued to meet assumptions for accurate statistical analysis
To unlock the question
Question 8
Multiple Choice

The nurse researcher knows that a sample is representative of a population when which statement is true?

Choose correct answer/s
A
The sample is homogeneous.
B
All units of a population are included.
C
The most readily accessible persons are used as subjects.
D
The characteristics of the sample closely approximate those of the population.
To unlock the question
Question 9
Multiple Choice

How can a nurse researcher tell the difference between an accessible population and a target population?

Choose correct answer/s
A
The accessible population meets the inclusion criteria, and the target population meets the exclusion criteria.
B
The target population meets the inclusion criteria, and the accessible population meets the exclusion criteria.
C
The accessible population represents the entire set of cases the researcher wishes to study, and the target population represents that part of the accessible population that could feasibly be included in the study.
D
The target population represents the entire set of cases the researcher wishes to study, and the accessible population represents that part of the target population that could feasibly be included in the study.
To unlock the question
Question 10
Multiple Choice

A nurse researcher would hesitate to use nonprobability sampling because:

Choose correct answer/s
A
It will result in reduced or limited generalizability.
B
Informed consent must be obtained.
C
It will require large, unmanageable sample sizes.
D
Sample sizes are too small for most methods of statistical analysis.
To unlock the question
Question 11
Multiple Choice

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

Choose correct answer/s
A
Quota
B
Random
C
Purposive
D
Convenience
To unlock the question
Question 12
Multiple Choice

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

Choose correct answer/s
A
Self-selection of subjects
B
Random selection of the sample
C
Subjects handpicked by the researcher
D
Representation of proportional segments of the population
To unlock the question
Question 13
Multiple Choice

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

Choose correct answer/s
A
The sample population is divided into subsets that are homogeneous for a particular trait or feature.
B
The sample population is divided into subsets for random assignment into an intervention or a usual-care group.
C
The sample population is randomly assigned to a specific subgroup that will vary from the others on the basis of type of treatment.
D
The sample population is randomly assigned to a specific subgroup that will vary from the others on the basis of treatment duration.
To unlock the question
Question 14
Multiple Choice

The researcher used word of mouth to accrue a sample of participants. This is most accurately referred to as what?

Choose correct answer/s
A
Referral
B
Networking
C
Recruitment
D
Quasi-probability
To unlock the question
Question 15
Multiple Choice

The nurse researcher selects matching as a technique in a research study. What does the technique of matching in a sampling strategy contribute to the research?

Choose correct answer/s
A
Improved overall design of the study
B
Elimination of the need for a control group
C
Increased equivalency of the comparison group
D
Reduced sample size; subjects serve as their own controls
To unlock the question
Question 16
Multiple Choice

The nurse researcher can most accurately determine sample size by considering what?

Choose correct answer/s
A
The stamina of the researcher in data collection
B
The importance of the independent variable
C
The age of the potential subjects
D
The design of the study
To unlock the question
Question 17
Multiple Choice

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

Choose correct answer/s
A
To estimate sample size
B
To establish sampling strata
C
To assign subjects randomly
D
To analyze sample representativeness
To unlock the question
Question 18
Multiple Choice

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

Choose correct answer/s
A
There is increased risk of obtaining a nonrepresentative sample.
B
There is increased risk of a study subject interacting with another study subject.
C
There is increased potential for loss of confidentiality.
D
There is increased regression toward the mean.
To unlock the question
Question 19
Multiple Choice

A research consumer should evaluate sample size in a research report by doing what?

Choose correct answer/s
A
By asking how many assistants were involved in data collection
B
By asking how representative the sample is relative to the target population
C
By asking how great the outcome difference is between or among study groups
D
By asking how many previous studies the researcher has conducted on similar topics
To unlock the question
Question 20
Multiple Choice

Which statement regarding sample size is most accurate?

Choose correct answer/s
A
Studies with smaller sample sizes have more accurate results.
B
Studies with smaller sample sizes are more likely to be representative of the target population.
C
Studies with larger sample sizes have more accurate results.
D
Studies with larger sample sizes are more likely to be representative of the target population.
To unlock the question