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:

Statistical Measure

A quantitative value derived from a sample or population, representing characteristics such as mean, median, or standard deviation.

Errors

Differences between observed values and the true values in data collection, analysis, or estimation.

Defects

Imperfections or faults in a product or process that deviate from desired specifications or standards.

Population

The entire pool from which a statistical sample is drawn, often referring to a total set of observations that can be analyzed.