A Data Model Is a ________

question 67

Multiple Choice

A data model is a ________.

• A) logical representation of database data
• B) repository of unprocessed data
• C) collection of isolated databases
• D) set of programs used to retrieve data
• E) array of data variables

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Definitions:

Parametric T-Test

A statistical test used to compare the means of two samples, assuming that the underlying populations have a normal distribution and known variance.

Nonparametric Counterpart

A type of statistical method that does not assume a specific distribution for the data, often used when the data doesn't meet the assumptions of parametric tests.

Matched Pairs

A study design in which subjects are paired based on certain characteristics, with one subject in each pair receiving each treatment.

Wilcoxon Signed Rank Test

A statistical hypothesis test that doesn't rely on parameter-based assumptions, designed to evaluate whether there's a difference in the population mean ranks of two related samples, matched samples, or repeated measurements on the same sample.