The Data Dictionary Usually Is Maintained

question 83

Multiple Choice

The data dictionary usually is maintained

• A)automatically by the DBMS.
• B)by the database administrator.
• C)by the database programmers.
• D)by top management.

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Definitions:

Linear Regression

A statistical method for modeling the relationship between a dependent variable and one or more independent variables by fitting a linear equation to the data.

Residuals

The differences between observed values and the expected values predicted by a model.

Fitted Values

Estimates or predictions generated by a statistical model that represent the best guesses for the dependent variable based on the model and the input values.

Constant Variance

The condition in which the variance of the error terms in a regression model is the same across all levels of the independent variable.