Each of the Following Is True of Volunteer Bias

question 211

Multiple Choice

. Each of the following is true of volunteer bias EXCEPT ______.

• A) volunteers for research may represent specific subgroups of the population who differ systematically from the overall population
• B) volunteers may be more interested in research than nonvolunteers
• C) volunteers may have more spare time than nonvolunteers
• D) volunteers are usually less intelligent but more trusting than nonvolunteers

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Definitions:

Degrees Of Freedom

The number of values in a statistical calculation that are free to vary.

Poisson Distribution

A probability distribution that models the number of times an event occurs in a fixed interval of time or space.

Null Hypothesis

A null hypothesis is a default position that there is no relationship between two measured phenomena or no difference among groups being compared in a statistical hypothesis test.

Expected Number

The predicted count or quantity based on probability calculations, often used in statistical analysis and planning.