A researcher randomly selects 6 fathers who have adult sons and records the?fathers' and?sons' heights to obtain the data below. Determine if sons are taller than their fathers at the ?=0.1 level of significance. The normal probability plot and boxplot indicate that the differences are approximately normally distributed with no outliers.

Observation 1 2 3 4 5 6 Height of father (in inches) 65.5 70.4 72.5 73.5 74.9 72.5 Height of son (in inches) 63.6 72.1 76.7 74.7 73.6 74.0