CHDA EXAM QUESTIONS AND ANSWERS 100% CORRECTCHDA EXAM QUESTIONS AND ANSWERS 100% CORRECTCHDA EXAM QUESTIONS AND ANSWERS 100% CORRECTCHDA EXAM QUESTIONS AND ANSWERS 100% CORRECT
Alpha level - ANSWER-The level of Type I error that is deemed acceptable based on context in statistical hypothesis testi...
CHDA EXAM QUESTIONS AND
ANSWERS 100% CORRECT
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."
Data - ANSWER-"The dates, numbers, images, symbols, letters, and words that
represent basic facts and observations about people, processes, measurements, and
conditions."
, Data dictionary - ANSWER-"A descriptive list of the names, definitions, and attributes of
data elements to be collected in an information system or database whose purpose is to
standardize definitions and ensure consistent use."
Data mining - ANSWER-The process of extracting and analyzing large volumes of data
from a database for the purpose of identifying hidden and sometimes subtle
relationships or patterns and using those relationships to predict behaviors.
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.
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