Q4: Cloud seeding has been studied for many decades as a weather modification procedure (for an interesting study of this subject, see the article in Technimetrics by Simpson, Alsen, and Eden, "A Bayesian Analysis of a Multiplicative Treatment Effect in Weather Modification", Vol. 17, pp. 161-166). The rainfall in acre-feet from 20 clouds that were selected at random and seeded with silver nitrate follows: 18.0, 30.7, 19.8, 27.1, 22.3, 18.8, 31.8, 23.4, 21.2, 27.9, 31.9, 27.1, 25.0, 24.7, 26.9, 21.8, 29.2, 34.8, 26.7, and 31.6. Can you support a claim that mean rainfall from seeded clouds exceeds 25 acre- feet? Use a 0.01. =