A researcher wants to conduct an experiment that uses a 2 X 3 X 3 design and requires ten participants in each cell. ____ participants would be needed for a between-subjects design but only ____ would be needed if a within-subjects design is used.
a. Eight, five
b. Eighteen, ten
c. Eight, three
d. Twenty-four, eight
Question 2
What effect do within-subjects designs have on F ratios?
a. F ratios are more sensitive to changes in the treatments
b. F ratios are less sensitive to changes in the treatments
c. F ratios tend to be smaller
d. There is no effect on F ratios.
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