Custom Practice Exam 1 CHDA UPDATED TEST
EXAM QUESTIONS WITH ANSWERS.
7.The capture of secondary diagnoses that increase the incidence of CCs and MCCs
may be benchmarked against other facilities by using which dataset?
a. OASIS
b. UACDS
c. MEDPAR
d. DEEDS - CORRECT ANSWER✅✅Correct Answer: C
Facilities can compare the percentage of discharges in each of the MS-DRG severity
groupings, the payment amount against the range of charges for the discharges in each
MS-DRG, or the length of stay for the discharges in each MS-DRG. These comparisons
can be done with either the Medicare Provider Analysis and Review (MEDPAR) data
(White 2016a, 158).
10.The mean is an appropriate statistic to use to measure which type of data?
a. Qualitative
b. Nominal
c. Ordinal
d. Ratio - CORRECT ANSWER✅✅Correct Answer: D
Appropriate descriptive statistics for ratio data are mean, median, standard deviation,
range, geometric mean, and coefficient of variation (White 2016a, 5)
11.We want to compare the average weight of patients before and after a specialty diet
is administered. We expect the weight to decrease after administration of the diet.
Which of the following tests should be conducted to determine if the average weight for
each patient is less at the conclusion of the diet?
a. Paired t-test
b. One-sample t-test
c. t-test for two independent sample means
d. Z-test for comparing two population proportions - CORRECT ANSWER✅✅Correct
Answer: A
A paired t-test may be used to compare a variable measured at two time points on the
same subject (White 2016a, 95).
17.A researcher would like to test the null hypothesis that the lengths of stay at two
hospitals are equal. What statistical test should the researcher use in this situation?
a. Tukey's HSD
b. t-test for means
c. ANOVA
d. Z-test for proportions - CORRECT ANSWER✅✅Correct Answer: B
,A two-sample t-test is a test of a null hypothesis to determine if the means of two groups
are statistically different from each other. An analyst may want to compare the lengths
of stay in two units of a hospital or two hospitals in the same system (White 2013, 98).
Case Mix Index Formula - CORRECT ANSWER✅✅The Case Mix Index (CMI) is the
average relative DRG weight of a hospital's inpatient discharges, calculated by
summing the Medicare Severity-Diagnosis Related Group (MS-DRG) weight for each
discharge and dividing the total by the number of discharges
Mann-Whitney Test - CORRECT ANSWER✅✅Non-Parametric Test, 2 samples that
have the SAME shape...even though Whitney is not a MAN
Wilcoxon Signed Rank Test - CORRECT ANSWER✅✅Non Parametric test with
Symmetric distribution, sort of like David Wilcox's even-toned singing (not signing)
Kruskal-Wallis and Friedman's ANOVA - CORRECT ANSWER✅✅Non-Parametric test,
same shape and equal VARIANCES. Because Friedman varies a lot from Chris
Wallace!
Nonparametric - CORRECT ANSWER✅✅Less statistical power, more liklely to
produce TYPE II Error
Independent Samples T Test is an example of a... - CORRECT
ANSWER✅✅Parametric Test
paired samples t-test - CORRECT ANSWER✅✅Parametric test used to compare two
means for a within-groups design, a situation in which every participant is in both
samples; also called a dependent-samples t test
One-way ANOVA - CORRECT ANSWER✅✅PARAMETRIC TEST A statistical test
used to analyze data from an experimental design with one independent variable that
has three or more groups (levels).
nonparametric tests - CORRECT ANSWER✅✅Statistical tests that are distribution
free; data do not have to conform to defined distribution characteristics.
19.Nonparametric tests such as a Kruskal-Wallis are advantageous compared to their
parametric counterparts for which of the following reasons?
a. They more efficiently handle large data sets.
b. They are optimized for continuous data.
c. They require more data before drawing conclusions.
d. They require fewer assumptions about the underlying data. - CORRECT
ANSWER✅✅Correct Answer: D
The Kruskal-Wallis test is a non-parametric test, which means that it does not assume
that the data come from a distribution that can be completely described by two
, parameters, mean, and standard deviation (the way a normal distribution can)
(McDonald 2014)
23.Your chief financial officer has contacted you because your facility's case-mix index
increased last year. He wishes to hear your theory on why this is so. Among the options
below, which would best explain an increase in the case-mix index?
a. The quality of clinical documentation improved.
b. There was turnover among experienced coding professionals in your HIM unit.
c. You discharged more inpatients that year.
d. A high volume surgeon took an extended leave. - CORRECT ANSWER✅✅Correct
Answer: A
The first and ultimate reason for excellent documentation is improved patient care
through clear communication between providers and an accurate picture of the patient's
medical situation and course of treatment. Additional examples are for more accurate
reimbursement and data reporting through programs dependent on diagnosis and
procedure codes such as Medicare severity diagnosis-related groups (MS-DRGs) (Hunt
2016, 266).
24.The percent of antibiotics administered immediately prior to open reduction and
internal fixation (ORIF) surgeries or the percent of deliveries accomplished by cesarean
section are examples of what type of performance measure?
a. Outcome measure
b. Data measure
c. Process measure
d. System measure - CORRECT ANSWER✅✅Correct Answer: C
A process measure has a scientific basis for it. In this example, the percentage of
antibiotics administered before surgery has been proven through evidence-based
medicine, so it is scientifically based (Shaw and Carter 2015, 45).
process measures - CORRECT ANSWER✅✅indicate something about the quality of
movement being produced
Third Normal Form (3NF) - CORRECT ANSWER✅✅A table is in 3NF when it is in 2NF
and no nonkey attribute is functionally dependent on another nonkey attribute; that is, it
cannot include transitive dependencies.
SDLC Phases - CORRECT ANSWER✅✅planning, analysis, design, development,
testing, implementation, maintenance
SDLC Analysis Phase - CORRECT ANSWER✅✅Involves analyzing end-user business
requirements and refining project goals into defined functions and operations of the
intended system
SDLC Planning Phase - CORRECT ANSWER✅✅establishes a high-level plan of the
intended project and determines project goals
EXAM QUESTIONS WITH ANSWERS.
7.The capture of secondary diagnoses that increase the incidence of CCs and MCCs
may be benchmarked against other facilities by using which dataset?
a. OASIS
b. UACDS
c. MEDPAR
d. DEEDS - CORRECT ANSWER✅✅Correct Answer: C
Facilities can compare the percentage of discharges in each of the MS-DRG severity
groupings, the payment amount against the range of charges for the discharges in each
MS-DRG, or the length of stay for the discharges in each MS-DRG. These comparisons
can be done with either the Medicare Provider Analysis and Review (MEDPAR) data
(White 2016a, 158).
10.The mean is an appropriate statistic to use to measure which type of data?
a. Qualitative
b. Nominal
c. Ordinal
d. Ratio - CORRECT ANSWER✅✅Correct Answer: D
Appropriate descriptive statistics for ratio data are mean, median, standard deviation,
range, geometric mean, and coefficient of variation (White 2016a, 5)
11.We want to compare the average weight of patients before and after a specialty diet
is administered. We expect the weight to decrease after administration of the diet.
Which of the following tests should be conducted to determine if the average weight for
each patient is less at the conclusion of the diet?
a. Paired t-test
b. One-sample t-test
c. t-test for two independent sample means
d. Z-test for comparing two population proportions - CORRECT ANSWER✅✅Correct
Answer: A
A paired t-test may be used to compare a variable measured at two time points on the
same subject (White 2016a, 95).
17.A researcher would like to test the null hypothesis that the lengths of stay at two
hospitals are equal. What statistical test should the researcher use in this situation?
a. Tukey's HSD
b. t-test for means
c. ANOVA
d. Z-test for proportions - CORRECT ANSWER✅✅Correct Answer: B
,A two-sample t-test is a test of a null hypothesis to determine if the means of two groups
are statistically different from each other. An analyst may want to compare the lengths
of stay in two units of a hospital or two hospitals in the same system (White 2013, 98).
Case Mix Index Formula - CORRECT ANSWER✅✅The Case Mix Index (CMI) is the
average relative DRG weight of a hospital's inpatient discharges, calculated by
summing the Medicare Severity-Diagnosis Related Group (MS-DRG) weight for each
discharge and dividing the total by the number of discharges
Mann-Whitney Test - CORRECT ANSWER✅✅Non-Parametric Test, 2 samples that
have the SAME shape...even though Whitney is not a MAN
Wilcoxon Signed Rank Test - CORRECT ANSWER✅✅Non Parametric test with
Symmetric distribution, sort of like David Wilcox's even-toned singing (not signing)
Kruskal-Wallis and Friedman's ANOVA - CORRECT ANSWER✅✅Non-Parametric test,
same shape and equal VARIANCES. Because Friedman varies a lot from Chris
Wallace!
Nonparametric - CORRECT ANSWER✅✅Less statistical power, more liklely to
produce TYPE II Error
Independent Samples T Test is an example of a... - CORRECT
ANSWER✅✅Parametric Test
paired samples t-test - CORRECT ANSWER✅✅Parametric test used to compare two
means for a within-groups design, a situation in which every participant is in both
samples; also called a dependent-samples t test
One-way ANOVA - CORRECT ANSWER✅✅PARAMETRIC TEST A statistical test
used to analyze data from an experimental design with one independent variable that
has three or more groups (levels).
nonparametric tests - CORRECT ANSWER✅✅Statistical tests that are distribution
free; data do not have to conform to defined distribution characteristics.
19.Nonparametric tests such as a Kruskal-Wallis are advantageous compared to their
parametric counterparts for which of the following reasons?
a. They more efficiently handle large data sets.
b. They are optimized for continuous data.
c. They require more data before drawing conclusions.
d. They require fewer assumptions about the underlying data. - CORRECT
ANSWER✅✅Correct Answer: D
The Kruskal-Wallis test is a non-parametric test, which means that it does not assume
that the data come from a distribution that can be completely described by two
, parameters, mean, and standard deviation (the way a normal distribution can)
(McDonald 2014)
23.Your chief financial officer has contacted you because your facility's case-mix index
increased last year. He wishes to hear your theory on why this is so. Among the options
below, which would best explain an increase in the case-mix index?
a. The quality of clinical documentation improved.
b. There was turnover among experienced coding professionals in your HIM unit.
c. You discharged more inpatients that year.
d. A high volume surgeon took an extended leave. - CORRECT ANSWER✅✅Correct
Answer: A
The first and ultimate reason for excellent documentation is improved patient care
through clear communication between providers and an accurate picture of the patient's
medical situation and course of treatment. Additional examples are for more accurate
reimbursement and data reporting through programs dependent on diagnosis and
procedure codes such as Medicare severity diagnosis-related groups (MS-DRGs) (Hunt
2016, 266).
24.The percent of antibiotics administered immediately prior to open reduction and
internal fixation (ORIF) surgeries or the percent of deliveries accomplished by cesarean
section are examples of what type of performance measure?
a. Outcome measure
b. Data measure
c. Process measure
d. System measure - CORRECT ANSWER✅✅Correct Answer: C
A process measure has a scientific basis for it. In this example, the percentage of
antibiotics administered before surgery has been proven through evidence-based
medicine, so it is scientifically based (Shaw and Carter 2015, 45).
process measures - CORRECT ANSWER✅✅indicate something about the quality of
movement being produced
Third Normal Form (3NF) - CORRECT ANSWER✅✅A table is in 3NF when it is in 2NF
and no nonkey attribute is functionally dependent on another nonkey attribute; that is, it
cannot include transitive dependencies.
SDLC Phases - CORRECT ANSWER✅✅planning, analysis, design, development,
testing, implementation, maintenance
SDLC Analysis Phase - CORRECT ANSWER✅✅Involves analyzing end-user business
requirements and refining project goals into defined functions and operations of the
intended system
SDLC Planning Phase - CORRECT ANSWER✅✅establishes a high-level plan of the
intended project and determines project goals
