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Alpha level - Correct Answer-The level of Type I error that is
deemed acceptable based on context in statistical hypothesis
testing. See Type I error.
Alternative hypothesis - Correct 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) - Correct Answer-The
payment unit used in the hospital outpatient prospective
payment system (OPPS). The classification is a resource-based
reimbursement system.
Analysis - Correct Answer-Reviewing and summarizing data
for use in decision making.
,Analysis of variance - Correct 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 - Correct 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 - Correct 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 - Correct Answer-The shape of the normal
distribution. The bell pealcs at the average and slopes down
on both sides symmetrically.
Binomial variable - Correct 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) - Correct 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) - Correct
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 - Correct 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.)