Which of the Following Is Not True About Representing Subtypes

question 78

Multiple Choice

Which of the following is not true about representing subtypes in a relational database design?

• A)One table is created for the supertype and one for each subtype.
• B)All of the attributes of the supertype are added to the subtype relations.
• C)The key of the supertype is made the key of the subtypes.
• D)A subtype and its supertype are representations of the same underlying table.
• E)An instance of the supertype may be related to one instance each of several subtypes.

Identify the importance of naturalistic observation in collecting unbiased data.

Understand the criteria for drawing cause-and-effect conclusions from experimental data.

Understanding categorization of variables within experiments (independent and dependent variables).

Recognizing methods used to reduce bias and ensure reliability in experiments (e.g., double-blind control, anonymity).

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Definitions:

Sequential Study

Study design that combines cross-sectional and longitudinal techniques.

Longitudinal

Pertains to research or studies that observe the same subjects over a period of time, often to detect changes or developments.

Cross-sectional

A research design that looks at data from a population at a single point in time to identify patterns and associations.

Sequential

Pertaining to events, processes, or items that follow one after another in a specific order.