A medical researcher believed the number of ear infections in swimmers can be reduced if the swimmers use earplugs. A sample of 10 people was selected, and the number of infections for a four-month period was recorded. During the first two months, the swimmers did not use the earplugs; during the second two months, they did. At the beginning of the second two-month period, each swimmer was examined to make sure that no infection was present. The data are shown here. At \(\alpha=0.05\), can the researcher conclude that using earplugs reduced the number of ear infections?

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Swimmer Number of ear infections Before, XB After, XA A B C D E F G H I J 1 305352- 2 1 4 4 0 1 4 3 323 1 3