Question: Twelve sets of identical twins are given psychological tests to

Twelve sets of identical twins are given psychological tests to determine whether the firstborn of the twins tends to be more aggressive than the secondborn. The test scores are shown in the accompanying table, where the higher score indicates greater aggressiveness. Do the data (saved in the AGGTWINS file) provide sufficient evidence (at α= .05) to indicate that the firstborn of a pair of twins is more aggressive than the other?

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  • CreatedMay 20, 2015
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