A Basic Principle of Probability Sampling Is That a Sample

question 9

Multiple Choice

A basic principle of probability sampling is that a sample will be representative of the population from which it is selected if all members of the population have an equal chance of being selected in the sample. Samples that have this quality are often labeled equal probability of selection method EPSEM) samples. Even carefully selected EPSEM samples are _____ of the populations from which they are drawn.

• A) not always representative of the sample
• B) not always perfectly representative
• C) not always perfectly representative.
• D) not always perfectly representative of the student population

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Definitions:

Cloud And Ground

Refers to lightning discharges that occur between a cloud and the earth's surface.

Static Charge

An imbalance of electric charges within or on the surface of a material, which remains until it is able to move away through an electric current or electrical discharge.

Spray Painting

The application of paint or another substance through the air onto a surface via the use of a spray gun, creating a uniform and smooth layer.

Electrostatic Charges

Voltage developed by an excess or lack of electrons on an object.