In a Database Management System,defining an Individual User View of the Database

question 94

Multiple Choice

In a database management system,defining an individual user view of the database is known as defining the

• A) subschema.
• B) name of a data element.
• C) schema.
• D) number of positions of the data element.

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Definitions:

Sample Variance

A statistic that measures the dispersion of a sample dataset, representing the average of the squared differences from the sample mean.

Population Variance

Population variance is a measure of the spread between numbers in a data set, representing the average of the squared differences from the population mean.

Random Sample

A selection taken from a group where each individual has the same probability of being chosen.

Hypothesis

A proposed explanation for a phenomenon, designed to be tested through experimentation or observation.