Which statement is most accurate regarding inclusion and exclusion criteria?
a. These criteria are not needed when the population being studied is composed of events.
b. These criteria serve to ensure that the characteristics of the sample and the population are congruent.
c. Inclusion criteria are used to define the independent variables, and exclusion criteria are used to define dependent variables.
d. Inclusion criteria are used to define the dependent variables, and exclusion criteria are used to define independent variables.
ANS: B
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A Inclusion and exclusion criteria are always needed in some form.
B Inclusion and exclusion criteria are designed to keep the population and sample characteristics congruent.
C Inclusion and exclusion criteria refer to sample subjects rather than to independent or dependent variables.
D Inclusion and exclusion criteria refer to sample subjects rather than independent or dependent variables.
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