In a Relational Database

question 74

Multiple Choice

In a relational database

• A) the user's view of the physical database is the same as the physical database
• B) users perceive that they are manipulating a single table
• C) a virtual table exists in the form of rows and columns of a table stored on the disk
• D) a programming language (COBOL)is used to create a user's view of the database

---

Definitions:

Population Mean

The average of all the members of a population.

Population Standard Deviation

A measure of the dispersion or spread of a set of data points in a population, calculated as the square root of the variance.

Interval Estimate

An estimate of a population parameter that is given as a range of values, usually defined by two numbers forming an interval believed to contain the parameter.

Interval Estimate

An estimate of a population parameter given as a range (interval) of values, defined by upper and lower bounds.