Steven Schmidt (1994) conducted a series of experiments examining the effects of humor on memory. In one study, participants were given a mix of humorous and non-humorous sentences and significantly more humorous sentences were recalled. However, Schmidt argued that the humorous sentences were not necessarily easier to remember, they were simply preferred when participants had a choice between the two types of sentence. To test this argument, he switched to an independent-measures design in which one group got a set of exclusively humorous sentences and another group got a set of exclusively non-humorous sentences. The following data are similar to the results from the independent measures study.

Do the results indicate a significant difference in the recall of humorous versus non-humorous sentences? Use a two-tailed test with α = .05.

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Nonhumorous Humorous Sentences Sentences 4 5 2 4 6 7 6 6 25 4 3 6 3 5 3 3 4 2 6 4 3 4 4 5 2 6 4 3 3 5