Hout, Duncan, and Sobel (1987) reported on the relative sexual satisfaction of heterosexual married couples. They asked each member of 91 couples to rate the degree to which they agreed with "Sex is fun for me and my partner," on a four-point scale ranging from 1 ("never or occasionally") to 4 ("almost always"). The mean difference was Mp = 0.0659 (women more satisfied), with SS = 152. Why is it appropriate to use a related-samples t-test? O Because the subjects are matched in terms of the dependent variable (satisfaction) O It is not appropriate-- a one-sample t-test should be used Because the satisfaction of the wife and the husband are not independent of each other It is not appropriate-- an independent samples t-test should be used