) A study was conducted to investigate the effectiveness of hypnotism in reducing pain. Results for randomly selected subjects are given below. At the 1% level of significance, test the claim that the sensory measurements are lower after hypnotism (scores are in cm. on a pain scale). Assume sensory measurements are normally distributed.

Before After 6.6 6.8 6.5 2.4 9.0 7.4 10.3 8.5 11.3 8.1 8.1 6.1 6.3 3.4 11.6 2.0