To test the belief that sons are taller than their fathers, a student randomly selects 13 fathers who have adult male children. She records the height of both the father and son in inches and obtains the following data. Are sons taller than their fathers? Use the alphaequals0.05 level of significance. Note: A normal probability plot and boxplot of the data indicate that the differences are approximately normally distributed with no outliers. Height of Father Height of Son 67.8 72.7 70.9 74.4 68.4 71.0 68.1 69.8 69.4 70.5 70.2 70.8 68.2 68.1 71.9 71.3 67.6 66.4 70.4 68.7 69.7 67.2 67.7 64.1 67.5 62.4