CHDA 2025/2026 QUESTIONS AND ANSWERS WITH
COPLETE SOLUTION!!
Alpha level Answer - The level of Type I error that is deemed acceptable based
on context in statistical hypothesis testing. See Type I error.
Alternative hypothesis Answer - The complement of the null hypothesis that is
to be tested using the appropriate statistical test. This hypothesis typically
requires some action to be taken.
Ambulatory payment classification (APC) Answer - The payment unit used in
the hospital outpatient prospective payment system (OPPS). The classification
is a resource-based reimbursement system.
Analysis Answer - Reviewing and summarizing data for use in decision making.
Analysis of variance Answer - The statistical tool used to compare more than
two population means. The null hypothesis tests that all of the population
means are equal.
Auditing Answer - "The performance of internal and external reviews (audits)
to identify variations from established baselines (for example, review of
outpatient coding as compared with CMS outpatient coding guidelines)."
,Balanced design Answer - An experimental design where the number of
subjects in each sample are the same for all populations sampled. The term is
relevant when performing an analysis of variance or a two sample t-test.
Bell curve Answer - The shape of the normal distribution. The bell pealcs at the
average and slopes down on both sides symmetrically.
Binomial variable Answer - "A variable that talces only two values (such as yes
or no; alive or dead). The probability of a yes or no is constant across all of the
subjects, and the outcome of each subject is independent of the others."
Case Mix Index (CMI) Answer - "The average relative weight of all cases treated
at a given facility or by a given physician, which reflects the resource intensity
or clinical severity of a specific group in relation to the other groups in the
classification system; calculated by dividing the sum of the weights of
diagnosis-related groups for patients discharged during a given period by the
total number of patients discharged."
Centers for Medicare and Medicaid Services (CMS) Answer - "The division of
the Department of Health and Human Services that is responsible for
developing healthcare policy in the United States, for administering the
Medicare program and the federal portion of the Medicaid program, and
maintaining the procedure portion of the International Classification of
Diseases, ninth revision, Clinical Modification (ICD-9-CM) and International
Classification of Diseases, tenth revision, Procedure Coding System (ICD-10-
PCS); called the Health Care Financing Administration (HCFA) prior to 2001."
Chi squared test Answer - A statistical test that is used to test for relationships
between categorical variables. The null hypothesis for this test is that there is
no association between the two variables. Represented by the symbol X2
(where X is the Greek letter chi.)
, Cluster random sampling Answer - "The population is divided into groups
before the sample is selected. The groups or clusters must be mutually
exclusive and exhaustive. (That is, every unit in the population is assigned to
one and only one cluster.) Clusters are then randomly selected to make up the
sample. Cluster sampling may be performed as single-stage or two-stage."
Cluster Sampling Answer - Sampling where population is divided into groups
(or clusters); groups are then randomly selected to form sample
CMS-1500 Answer - "1. The universal insurance claim form developed and
approved by the American Medical Association (AMA) and the Centers for
Medicare and Medicaid Services (CMS) that physicians use to bill Medicare,
Medicaid, and private insurers for professional services provided 2. A Medicare
claim form used to bill third-party payers for provider services, for example,
physician office visits."
Coefficient of determination Answer - "A statistic that measures the amount of
variance in a dependent variable explained by one or more independent
variables. If there is one independent variable, then this value is the Pearson
Correlation Coefficient squared."
Confidence interval Answer - An interval that is centered at the sample
estimate of a population value that may be calculated so that it has a preset
probability of containing the population value.
Confidence level Answer - The probability that a confidence interval includes
the true value of a population statistic.
Contingency tables Answer - A useful method for displaying the relationship
between two categorical variables. Each category is displayed as rows or
columns. The cells in the table represent the count of subjects with each
category attribute.
COPLETE SOLUTION!!
Alpha level Answer - The level of Type I error that is deemed acceptable based
on context in statistical hypothesis testing. See Type I error.
Alternative hypothesis Answer - The complement of the null hypothesis that is
to be tested using the appropriate statistical test. This hypothesis typically
requires some action to be taken.
Ambulatory payment classification (APC) Answer - The payment unit used in
the hospital outpatient prospective payment system (OPPS). The classification
is a resource-based reimbursement system.
Analysis Answer - Reviewing and summarizing data for use in decision making.
Analysis of variance Answer - The statistical tool used to compare more than
two population means. The null hypothesis tests that all of the population
means are equal.
Auditing Answer - "The performance of internal and external reviews (audits)
to identify variations from established baselines (for example, review of
outpatient coding as compared with CMS outpatient coding guidelines)."
,Balanced design Answer - An experimental design where the number of
subjects in each sample are the same for all populations sampled. The term is
relevant when performing an analysis of variance or a two sample t-test.
Bell curve Answer - The shape of the normal distribution. The bell pealcs at the
average and slopes down on both sides symmetrically.
Binomial variable Answer - "A variable that talces only two values (such as yes
or no; alive or dead). The probability of a yes or no is constant across all of the
subjects, and the outcome of each subject is independent of the others."
Case Mix Index (CMI) Answer - "The average relative weight of all cases treated
at a given facility or by a given physician, which reflects the resource intensity
or clinical severity of a specific group in relation to the other groups in the
classification system; calculated by dividing the sum of the weights of
diagnosis-related groups for patients discharged during a given period by the
total number of patients discharged."
Centers for Medicare and Medicaid Services (CMS) Answer - "The division of
the Department of Health and Human Services that is responsible for
developing healthcare policy in the United States, for administering the
Medicare program and the federal portion of the Medicaid program, and
maintaining the procedure portion of the International Classification of
Diseases, ninth revision, Clinical Modification (ICD-9-CM) and International
Classification of Diseases, tenth revision, Procedure Coding System (ICD-10-
PCS); called the Health Care Financing Administration (HCFA) prior to 2001."
Chi squared test Answer - A statistical test that is used to test for relationships
between categorical variables. The null hypothesis for this test is that there is
no association between the two variables. Represented by the symbol X2
(where X is the Greek letter chi.)
, Cluster random sampling Answer - "The population is divided into groups
before the sample is selected. The groups or clusters must be mutually
exclusive and exhaustive. (That is, every unit in the population is assigned to
one and only one cluster.) Clusters are then randomly selected to make up the
sample. Cluster sampling may be performed as single-stage or two-stage."
Cluster Sampling Answer - Sampling where population is divided into groups
(or clusters); groups are then randomly selected to form sample
CMS-1500 Answer - "1. The universal insurance claim form developed and
approved by the American Medical Association (AMA) and the Centers for
Medicare and Medicaid Services (CMS) that physicians use to bill Medicare,
Medicaid, and private insurers for professional services provided 2. A Medicare
claim form used to bill third-party payers for provider services, for example,
physician office visits."
Coefficient of determination Answer - "A statistic that measures the amount of
variance in a dependent variable explained by one or more independent
variables. If there is one independent variable, then this value is the Pearson
Correlation Coefficient squared."
Confidence interval Answer - An interval that is centered at the sample
estimate of a population value that may be calculated so that it has a preset
probability of containing the population value.
Confidence level Answer - The probability that a confidence interval includes
the true value of a population statistic.
Contingency tables Answer - A useful method for displaying the relationship
between two categorical variables. Each category is displayed as rows or
columns. The cells in the table represent the count of subjects with each
category attribute.
