Because of the Need to Know the Functional Dependencies in a Database,it

question 48

Multiple Choice

Because of the need to know the functional dependencies in a database,it is a good idea to create a(n) ________.

• A)conceptual schema
• B)internal schema
• C)dependency graph
• D)table-relationship diagram
• E)entity-relationship diagram

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Definitions:

Discrete Random Variable

A variable that takes on a countable number of distinct values, often resulting from counting processes.

With Replacement

In sampling, "with replacement" means that once an item is selected, it's put back into the population before the next selection, making it possible to be chosen again.

Sampling Without Replacement

A method of sampling where once an individual is selected, they are not placed back into the population for the possibility of a second selection.

Hypergeometric Distribution

A probability distribution used to calculate probabilities for drawing successes without replacement from a finite population.