CHDA Exam Study Guide with Complete
Solutions
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 appr...
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.
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