NR449 EVIDENCE-BASED PRACTICE QUIZ
4 (CHAPTER 13 AND 15) {LATEST 2026 -
2027 update} 330 QUESTIONS AND
ANSWERS 100% CORRECT
The researcher must make decisions about the appropriateness of a statistical test
based on the following factors: - correct answer - The requirements of the research
question
- The number of groups to be tested
- The level of measurement of the independent and dependent variables
- The statistical and mathematical assumptions of the test
There are essentially three versions of this test that can be applied to determine
differences in mean values: - correct answer 1. The one-sample t test quantifies the
difference between a mean value in a sample and a mean value in the larger
population. For example, a one- sample t test could test the difference between a
hospital's mean length of stay and the national average.
,2. The independent-samples t test quantifies the difference between the mean in one
group and the mean in another group. An example would be a test to determine if
mean lengths of stay were different for rural and urban hospitals. This t test variant
could also be used as a test of effectiveness by comparing the mean in an
experimental group to the value for a control group. For example, an independent-
samples t test would be appropriate to determine if units that relied on standard
orders sets had a shorter length of stay than units that did not.
3. The paired-samples t test quantifies the difference between a mean value measured
in the same group over time. For example, a paired-sample t test could be used to
answer questions about average length of stay before and after a change in Medicare
reimbursement.
Error Multiple Comparisons - correct answer The increased error associated with
conducting multiple comparisons in the same analysis; the 5% allowable error for each
test is multiplied by the number of comparisons, resulting in an inflated error rate
, Factors - correct answer Independent variables in an ANOVA that are measured as
categories
Levels - correct answer Categories that make up factors in an ANOVA
ANOVA - correct answer - One of the most frequently used statistical tests in
evidence-based research studies.
- It is a staple for testing the effectiveness of interventions because of its versatility
and its capacity to produce a tremendous amount of information.
- It is effective in studies utilizing experimental and quasi- experimental designs
Four Basic Kinds of ANOVA - correct answer 1. Univariate ANOVA - applied to
determine if groups differ on a single numerical outcome
4 (CHAPTER 13 AND 15) {LATEST 2026 -
2027 update} 330 QUESTIONS AND
ANSWERS 100% CORRECT
The researcher must make decisions about the appropriateness of a statistical test
based on the following factors: - correct answer - The requirements of the research
question
- The number of groups to be tested
- The level of measurement of the independent and dependent variables
- The statistical and mathematical assumptions of the test
There are essentially three versions of this test that can be applied to determine
differences in mean values: - correct answer 1. The one-sample t test quantifies the
difference between a mean value in a sample and a mean value in the larger
population. For example, a one- sample t test could test the difference between a
hospital's mean length of stay and the national average.
,2. The independent-samples t test quantifies the difference between the mean in one
group and the mean in another group. An example would be a test to determine if
mean lengths of stay were different for rural and urban hospitals. This t test variant
could also be used as a test of effectiveness by comparing the mean in an
experimental group to the value for a control group. For example, an independent-
samples t test would be appropriate to determine if units that relied on standard
orders sets had a shorter length of stay than units that did not.
3. The paired-samples t test quantifies the difference between a mean value measured
in the same group over time. For example, a paired-sample t test could be used to
answer questions about average length of stay before and after a change in Medicare
reimbursement.
Error Multiple Comparisons - correct answer The increased error associated with
conducting multiple comparisons in the same analysis; the 5% allowable error for each
test is multiplied by the number of comparisons, resulting in an inflated error rate
, Factors - correct answer Independent variables in an ANOVA that are measured as
categories
Levels - correct answer Categories that make up factors in an ANOVA
ANOVA - correct answer - One of the most frequently used statistical tests in
evidence-based research studies.
- It is a staple for testing the effectiveness of interventions because of its versatility
and its capacity to produce a tremendous amount of information.
- It is effective in studies utilizing experimental and quasi- experimental designs
Four Basic Kinds of ANOVA - correct answer 1. Univariate ANOVA - applied to
determine if groups differ on a single numerical outcome
