When extraneous variables influence and distort the relationship between the independent variable (IV) and the dependent variable (DV) so that the findings do not reflect a true relationship between the IV and the DV, the result is
a. voided.
b. inconsistent.
c. randomization.
d. bias.
Question 2
A method of sampling in which all subjects in the sample have an equal chance of being assigned to either the treatment group or the control group is
a. between-group design.
b. within-group design.
c. random assignment.
d. random sampling.
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