Page 1 of 21
Custom Practice Exam 2026 QUESTIONS LATEST EXAM
SOLVED QUESTIONS & ANSWERS VERIFIED 100%
GRADED A+
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: 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: 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
, Page 2 of 21
b. One-sample t-test
c. t-test for two independent sample means
d. Z-test for comparing two population proportions
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: 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
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
Non-Parametric Test, 2 samples that have the SAME shape...even though Whitney
is not a MAN
Wilcoxon Signed Rank Test
Non Parametric test with Symmetric distribution, sort of like David Wilcox's even-
toned singing (not signing)
Kruskal-Wallis and Friedman's ANOVA
Non-Parametric test, same shape and equal VARIANCES. Because Friedman varies
a lot from Chris Wallace!
Nonparametric
Less statistical power, more liklely to produce TYPE II Error
, Page 3 of 21
Independent Samples T Test is an example of a...
Parametric Test
paired samples t-test
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
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
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: 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: A
The first and ultimate reason for excellent documentation is improved patient care
through clear communication between providers and an accurate picture of the
Custom Practice Exam 2026 QUESTIONS LATEST EXAM
SOLVED QUESTIONS & ANSWERS VERIFIED 100%
GRADED A+
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: 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: 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
, Page 2 of 21
b. One-sample t-test
c. t-test for two independent sample means
d. Z-test for comparing two population proportions
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: 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
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
Non-Parametric Test, 2 samples that have the SAME shape...even though Whitney
is not a MAN
Wilcoxon Signed Rank Test
Non Parametric test with Symmetric distribution, sort of like David Wilcox's even-
toned singing (not signing)
Kruskal-Wallis and Friedman's ANOVA
Non-Parametric test, same shape and equal VARIANCES. Because Friedman varies
a lot from Chris Wallace!
Nonparametric
Less statistical power, more liklely to produce TYPE II Error
, Page 3 of 21
Independent Samples T Test is an example of a...
Parametric Test
paired samples t-test
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
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
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: 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: A
The first and ultimate reason for excellent documentation is improved patient care
through clear communication between providers and an accurate picture of the
