If an Entity Has Three Unique Attributes,how Many Primary Keys

question 79

Multiple Choice

If an entity has three unique attributes,how many primary keys will its mapped relation have?

• A)0
• B)1
• C)2
• D)3

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Definitions:

Significance Level

The probability of inappropriately disapproving the null hypothesis in a study of statistics, generally labelled as alpha.

Linearly Related

Shows a direct correlation between two variables in which the rate of increase or decrease in one variable is consistent with the rate in the other variable.

Indicator Variables

Indicator variables, also known as dummy variables, are used in statistical models to represent categorical data by assigning a binary value (usually 0 or 1) to each category.

Indicator Variables

Variables in statistical modeling, often binary, used to represent the presence or absence of a characteristic.