Which characteristic is necessary for an extraneous variable to become a confounding variable?
a. It must change systematically from one participant to the next.
b. It must change systematically when the independent variable is changed.
c. It must have no systematic relationship with the dependent variable.
d. It must have no systematic relationship to the independent or dependent variables.
Question 2
The theoretical distribution of an infinite number of samples of the population of interest in a study is called a(n) ____ distribution.
a. probabilistic
b. sampling
c. likelihood
d. error
Variable expressivity
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