An Attribute That Must Have a Value for Every Entity

question 19

Multiple Choice

An attribute that must have a value for every entity (or relationship) instance is a(n) :

• A) composite attribute.
• B) required attribute.
• C) optional attribute.
• D) multivalued attribute.

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Definitions:

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is true, commonly denoted by alpha.

Confidence Interval

A range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter with a certain degree of confidence.

Aptitude Tests

Assessments designed to measure a person's ability or potential to succeed in a particular task or career.

Significance Level

A threshold below which an observed effect is considered statistically significant, often denoted by alpha (α).