10.53 A study was conducted at Virginia Tech to determine if the “strength” of a wound from surgical incision is affected by the temperature of the knife. Eight dogs were used in the experiment. “Hot” and “cold”

incisions were made on the abdomen of each dog, and the strength was measured. The resulting data appear below.

Dog Knife Strength 11223344 Hot Cold Hot Cold Hot Cold Hot Cold 5120 8200 10, 000 8600 10, 000 9200 10, 000 6200 Dog Knife Strength 55667788 Hot Cold Hot Cold Hot Cold Hot Cold 10, 000 10, 000 7900 5200 510 885 1020 460

(a) Write an appropriate hypothesis to determine if there is a significant difference in strength between the hot and cold incisions.

(b) Test the hypothesis using a paired t-test. Use a P-value in your conclusion.