In a Relational Database, the Three Basic Operations Used to Develop

question 27

Multiple Choice

In a relational database, the three basic operations used to develop useful sets of data are

• A) select, project, and where.
• B) select, join, and where.
• C) select, project, and join.
• D) select, from, and join.

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Definitions:

Standard Deviation

A figure that gauges the scatter of data points around the mean value, demonstrating the extent of dispersion.

Test Statistic

A standardized value used in statistical hypothesis testing to determine whether to reject the null hypothesis.

Null Hypotheses

A statement used in statistical testing which indicates that no significant difference or effect is expected.

p-value

A statistical measure that indicates the probability of the observed data, under the null hypothesis, being at least as extreme as it is; used in hypothesis testing.