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Test Bank for Nursing Research in Canada 5th Edition by Mina Singh
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Test Bank for Nursing Research in Canada 5th Edition by Mina Singh
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Test Bank for Nursing Research in Canada 5th Editionby Mina Singh,
Sampling in research may be defined as:
a. insurance that each person has a chance of being included in the study.
b. establishment of criteria for eligibility to participate in a study.
c. identification of the population in which the researcher is interested.
d. selection of a subset of a population to represent the whole population. -
ANSWER ANS: D
Sampling involves selecting a group of people, events, behaviors, or other elements
with which to conduct a study. Samples are expected to represent a population of
people.
A researcher is interested in studying lifestyle management in patients with
inflammatory bowel disease. The researcher contacts the Crohn's and Colitis
Foundation of America to determine how to best access this patient population.
Patients with inflammatory bowel disease are an example of which of the following?
a. Accessible population
b. Element
c. Sample
d. Target population - ANSWER ANS: D
The target population is the entire set of individuals who meet the sampling criteria.
Subjects who participate in a study of patients with inflammatory bowel disease are
described as the:
a. accessible population.
b. element.
c. sample.
d. target population. - ANSWER ANS: C
A sample is that group of people who are representing the entire population and
participating in the study. Samples are expected to represent an entire population.
The Crohn's and Colitis Foundation of America referred the interested researcher to
a local chapter of the organization. The local chapter agreed to send out letters on
behalf of the researcher inviting potential subjects to contact the researcher if they
are willing to participate in a study. Potential subjects in this situation would be
described as the:
a. accessible population.
b. element.
c. sample.
d. target population. - ANSWER ANS: A
An accessible population is the portion of the target population to which the
researcher has reasonable access.
,The population from which the researcher selects the actual study sample is referred
to as the:
a. accessible population.
b. scientific population.
c. target population.
d. theoretical population. - ANSWER ANS: A
An accessible population is the portion of the target population to which the
researcher has reasonable access. The sample is obtained from the accessible
population.
In a study of liver transplant recipients, the researcher specifies that the subjects
must be 18 years of age or older and the recipient of only one liver transplant. These
criteria are an example of:
a. demographic attributes.
b. exclusion criteria.
c. extraneous variables.
d. inclusion criteria. - ANSWER ANS: D
Inclusion criteria are those characteristics that the subject or element must possess
to be part of the target population.
The adequacy of a sample would be primarily based on which of the following
criteria?
a. Method chosen for sample selection
b. Representativeness of the population
c. Size of the total population
d. Willingness of subjects to participate - ANSWER ANS: B
A sample needs to be representative in terms of characteristics, such as age,
gender, ethnicity, income, and education
A sample that accurately reflects the characteristics of the population from which it is
drawn is a:
a. cluster sample.
b. purposive sample.
c. random sample.
d. representative sample. - ANSWER ANS: D
Representativeness means that the sample, accessible population, and target
population are alike in as many ways as possible.
Sample attrition would be reflected by the:
a. average death rate of the population under study.
b. inability to access identified members of a population.
c. number of patients who die while participating in a study.
d. number of patients who drop out of a study. - ANSWER ANS: D
Sample attrition or mortality is the withdrawal or loss of subjects from a study
,The term "comparison group" in research refers to the group of patients in a:
a. nonrandom sample who do not receive a treatment.
b. nonrandom sample who receive a treatment.
c. random sample who do not receive a treatment.
d. random sample who receive a treatment. - ANSWER ANS: A
If nonrandom methods are used for sample selection, the group not receiving a
treatment is referred to as a comparison group.
Which of the following would be the best method for randomly assigning subjects (n
= 40) to treatment (n = 20) and control (n = 20) groups in an intervention study?
Assign numbers to all subjects and:
a. ignore numbers; group the subjects by diagnosis or physician.
b. place the first 20 subjects in one group and the last in the other.
c. put even-numbered subjects in one group, odd numbered in the other.
d. put numbers 1 to 40 in a box and blindly draw from the box. - ANSWER ANS: D
In the approach described, all 40 of the subjects have an equal chance of being
assigned to either the treatment group or the control group.
Which of the following is true about probability sampling? Probability sampling:
a. can take different forms, but random selection is always used.
b. is the most economical way to get large numbers of subjects.
c. guarantees that the sample is representative.
d. subjects are handpicked because they have the expertise to provide information
for the study. - ANSWER ANS: A
Random sampling allows each individual in the population an opportunity to be
selected for the sample.
Another name for probability sampling is:
a. accidental sampling.
b. purposive sampling.
c. quota sampling.
d. random sampling. - ANSWER ANS: D
In probability sampling, every member of the population has a probability higher than
zero of being selected for the sample. To achieve this probability, the sample is
obtained randomly.
The researcher is to select a set of five subjects using a random numbers table. The
selected population is 50. The researcher's pencil was initially placed on the second
column from the left and third row down. The decision is to move across the columns
to the right.
06 84 10 22 56 72 25 70 69 43
07 63 10 34 66 39 54 02 33 85
03 19 63 93 72 52 13 30 44 40
77 32 69 58 25 15 55 38 19 62
20 01 94 54 66 88 43 91 34 28
The subject numbers will be:
, a. 13, 30, 44, 40, 32
b. 19, 38, 55, 15, 25
c. 19, 63, 93, 72, 52
d. 33, 02, 54, 39, 66 - ANSWER ANS: C
Which of the following statements is true about stratified random sampling?
a. Allows the researcher to use a smaller sample size
b. Ensures obtaining a larger sample at lower cost
c. Internal validity is strengthened with this type of sampling
d. Involves the selection of certain subjects from a convenience sample - ANSWER
ANS: A
With stratification, the researcher can use a smaller sample size and achieve the
same degree of representativeness in relation to the stratified variable as a large
sample acquired through simple random sampling.
Cluster sampling is:
a. a form of nonprobability sampling used in small surveys.
b. also known as multistage sampling.
c. unlikely to result in sampling errors.
d. useful when the target population is found in a small geographical area. -
ANSWER ANS: B
Both terms, cluster sampling and multistage sampling, have the same meaning in
sampling methods.
A person is shopping in the mall and is approached by individuals who identify
themselves as researchers for a local food chain. They ask the person to participate
in their study by answering a few questions. As a subject for this survey, the person
was selected by which method of sampling?
a. Convenience sampling
b. Purposive sampling
c. Random sampling
d. Systematic sampling - ANSWER ANS: A
Findings of an intervention study with a convenience sample:
a. are generalizable to a wider group of patients with related problems.
b. are to be discounted because they are extremely biased.
c. provide no useful information.
d. should be replicated before being applied to a wider population. - ANSWER
ANS: D
Representativeness of the sample is a concern in convenience sampling, and
generalizability is therefore limited.
Which type of sampling will get the largest number of subjects in the shortest period
of time?
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