Answer to Question #340817 in Statistics and Probability for Ronel

Question

Cloud seeding has been studied for many decades as a weather modification

procedure. The rainfall in acre-feet from 20 clouds 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 31.6

Can you support the claim that mean rainfall from seeded clouds exceeds 25 acre-

feet? Use α = 0.01. Assume that rainfall is normally distributed. [taken from

Montgomery, p. 306]

Answer 1

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