WGU D514 Analytical Methods of Healthcare Leaders: Practice Test #2 All Graded A+ Questions and Their Answers
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WGU D514
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WGU D514
WGU D514 Analytical Methods of Healthcare Leaders: Practice Test #2 All Graded A+ Questions and Their Answers
ANOVA test - ANSWER Analysis of variance (ANOVA) may be used in research studies where there are two or more groups to compare.
Chi-square tests - ANSWER Chi-square tests de...
D514 Analytical Methods of
Healthcare Leaders: Practice
Test #2 All Graded A+ Questions
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and Their Answers
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ANOVA test - ANSWER Analysis of variance (ANOVA) may be used in research
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studies where there are two or more groups to compare.
Chi-square tests - ANSWER Chi-square tests determine if an association exists
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between two categorical variables.
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Control group - ANSWER In a healthcare environment, this group of patients does
not receive the treatment that is being studied.
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Experimental group - ANSWER This group of patients receives the treatment being
studied with follow-up observation to determine the effect of the treatment.
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F-test - ANSWER The F-test is designed to test if two population variances are
equal. The ratio of the two variances is compared. If they are equal, the ratio of the
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variances will be 1.
Frequency - ANSWER Frequencies measure how often a particular value occurs to
assess the importance of a value or check the variation of the values in a study.
Hypothesis - ANSWER A proposed explanation for an observation that leads to a
prediction. Through investigation and the use of statistical data, those doing the study
will either confirm or reject the hypothesis. Testing the hypothesis will show if there is a
link (or not) between two or more variables.
,Integrity - ANSWER Research always makes some assumptions, depending on the
type of method used. Research assumptions must be identified to determine possible
breaches of integrity.
Interval data - ANSWER Interval data includes units of equal size, such as IQ
results. There is no zero point. An example of interval scale is time: Time is measured in
24 hours in each day; the time between each hour is the same, 60 minutes.
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Mean - ANSWER Mean is the arithmetic average. Divide the sum of all scores by
the total number of scores.
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Median - ANSWER Median is the midpoint of the distribution of values, or the point
above or below which 50 percent of the values fall.
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Methods section components - ANSWER When analyzing the quality of a study, a
careful evaluation of the research methods can reveal critical details about population
and sample, covariables and hypothesis, data presentation, statistical analysis, and
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study limitations.
Misleading statistics - ANSWER Interpreting and presenting the results of data
analysis affords many opportunities for accidental or deliberate misrepresentations of
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data. Common examples include implying causation, extrapolating beyond the
reasonable, relying on a biased or incomplete sample, and using inappropriate
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graphical representations.
Mode - ANSWER Mode is the value that occurs most frequently in the data.
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Multivariate regression analyses - ANSWER Multivariate regression analyses can
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be used to analyze and adjust risk. This analysis model contrasts each measured factor
to the patient's risk of a particular outcome.
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Nominal data - ANSWER Nominal data can be measured as a frequency or
percentage, and the mean of these data cannot be calculated. Nominal data in
healthcare might include demographic information about patients. The word nominal
means "pertaining to a name."
Ordinal data - ANSWER Ordinal data can be measured as a frequency, and the
mean of ordinal data is often calculated. Ordinal data in healthcare might include patient
satisfaction surveys using a Likert scale. The word ordinal means to "put in order."
, Parametric and nonparametric tests - ANSWER Parametric tests are based on
probability distributions. Nonparametric tests are used when data are not normally
distributed.
Pearson's correlation - ANSWER Pearson's correlation is used with interval and
ordinal scale data and determines the extent to which a change in one variable tends to
be associated with a change in another.
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Qualitative research methods - ANSWER Qualitative research is aimed at
understanding perceptions, perspectives, interpretations, and opinions. Qualitative
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research methods often include questionnaires, interviews, written documents,
observations, and focus groups.
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Ratio data - ANSWER Divide one quantity by another, and you have a value. You
will have a proportion, a percentage or a rate.
Reliability, validity, and analysis of questionnaires - ANSWER Questionnaires can be
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evaluated for reliability based on their consistency (stability) or repeatability over time;
questionnaires are valid if they measure or record what they purport to measure. Data
from questionnaires may then be grouped according to nominal, ordinal, or interval or
ratio data.
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Research - ANSWER Research can inform decisions regarding the development
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and efficacy of new processes, systems, technologies, environments, and
organizational structures to support operations.
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Research platform - ANSWER Research is built on a platform of previous
knowledge, the scientific method.
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Risk adjustment - ANSWER Risk adjustment is essential for comparing data across
systems, especially among patients with varying comorbid diseases and complex
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treatment modalities. Multivariate regression analyses can be used to analyze and
adjust risk. This analysis model looks at each measured factor to the patient's risk of a
particular outcome.
Risk of error and harm - ANSWER Studies should include an analysis of any
sources of error as well as a thorough explanation of the consequences associated with
a particular study treatment.
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