The data below on pre- and postoperative lung capacities for 22 patients who underwent...

The data below on pre- and postoperative lung capacities for 22 patients who underwent surgery as treatment for tuberculosis kyphosis of the spine appeared in the paper “Tuberculosis Kyphosis, Correction with Spinal Osteotomy, Halo-Pelvic Distractor, and Anterior and Posterior Fusion” ( Journal of Bone Joint Surgery [1974]: 1419–1434). Do the data suggest that surgery increases the mean lung capacity? Use a level .05 largesample signed-rank test.