An E-R Diagram

question 79

Multiple Choice

An E-R diagram

• A)only depicts the contents of a database.
• B)only graphically models an organization.
• C)only defines a database so that it represents all aspects of the organization.
• D)depicts both the contents of a database and graphically models an organization.

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Definitions:

Confidence Interval

A set of values, taken from data samples, which is predicted to include the value of an unspecified population attribute.

Standard Deviation

Standard deviation is a statistical measure of the dispersion or variability within a data set, indicating how much individual data points deviate from the mean.

Normal Distribution

A bell-shaped frequency distribution curve that is symmetric about the mean, showing that data near the mean are more frequent in occurrence.

Exponential Distribution

The exponential distribution is a continuous probability distribution used to model the time or space between events in a Poisson process.