Which of the Following Is True About Making Changes to the Database

question 100

Multiple Choice

Which of the following is true about making changes to the database structure?

• A)The DBA need not get input from users on the issue because it is a technical decision.
• B)Formal policies and procedures for requesting a change are not used because they are too limiting.
• C)Documentation of when the change was made,how it was made,and why it was made must be created.
• D)Changes do not produce unexpected results because the DBA will have investigated the change thoroughly before implementing it.

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Definitions:

Random Sample

A subset of a population selected in such a manner that every individual has an equal chance of being chosen.

Regression Line

A line of best fit through a scatter plot of data points that shows the linear relationship between two variables.

Linear Regression

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

Standard Error

A measure of the statistical accuracy of an estimate, indicating the variability of an estimate when different samples are taken from the same population.