A develоpmentаl psychоlоgist compаres 4-yeаr-olds and 8-year-olds on their ability to understand the analogies used in stories. The scores for the five 4-year-olds tested were 7, 6, 2, 3, and 8. The scores for the three 8-year-olds tested were 9, 2, and 5. If the researcher is interested in whether older kids do better than younger kids, what is the appropriate statistical test to run?