Hout, Duncan, and Sobel (1987) reported on the relative sexual satisfaction of married couples. They asked each member of 91 married 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 “never or occasionally” to “almost always.” The data appear below (I know it’s a lot of data, but it’s an interesting question):

Husband111111111111111 Wife 1 1 1 1 1 1 1 2 2 2 2 2 2 2 3 Husband111122222222222 Wife 3 4 4 4 1 1 2 2 2 2 2 2 2 2 3 Husband222222222333333 Wife 3 3 4 4 4 4 4 4 4 1 2 2 2 2 2 Husband333333333333344 Wife 3 3 3 3 4 4 4 4 4 4 4 4 4 1 1 Husband444444444444444 Wife 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 Husband4444444444444444 Wife 3 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Start out by running a matched-sample t test on these data. Why is a matched-sample test appropriate?