In which research situation would the study be confounded?
a. An extraneous variable varies systematically along with the two variables being studied.
b. Two or more extraneous variables vary systematically together.
c. An extraneous variable does not vary systematically with the other variables being investigated.
d. An extraneous variable does not vary systematically with other extraneous variables.
Question 2
The larger the within-groups (error) variance
a. the more difficult it becomes to show the effects of experimental treatment.
b. the easier it becomes to show the effects of experimental treatment.
c. the more difficult it becomes to perform the F test.
d. the easier it becomes to show a causal effect of the independent variable on the dependent variable.
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