Random Samples Provide ________ Estimates of Population Averages If the Samples

question 59

Multiple Choice

Random samples provide ________ estimates of population averages if the samples have small ________.

• A) good;means
• B) good;standard deviations
• C) poor;means
• D) poor;standard deviations

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Definitions:

Normal Distribution

A bell-shaped curve that describes the spread of a variable where most observations cluster around the central peak and the probabilities for values farther from the mean taper off symmetrically.

Probability

Probability measures the likelihood of a given event occurring, ranging from 0 (impossibility) to 1 (certainty).

Cluster Sample

A sampling technique where the population is divided into groups, or clusters, and a sample of these clusters is selected to represent the population.

Simple Random Sample

A sample drawn in such a way that every element of the population has an equal chance of being selected.