Data from a cloud-seeding experiment are in the file CLOUDS onthe course website. The file contains rainfall in acre-feet from 52clouds: 26 of which were chosen at random and seeded with thecompound silver nitrate and the other 26 were not seeded withsilver nitrate.
Simpson, Alsen, and Eden. (1975). A Bayesian analysis of amultiplicative treatment effect in weather modification.Technometrics 17, 161-166.
- Make a boxplot of the amount of rainfall from the seededclouds. Discuss.
- Make a normal quantile plot of the amount of rainfall from theseeded clouds. Discuss.
- Find the sample mean and sample standard error of the amount ofrainfall from the seeded clouds.
- Report a 99% confidence interval for the mean amount ofrainfall from the seeded clouds.
- Conduct a hypothesis test of whether the true mean amount ofrainfall from the seeded clouds is 750 acre-feet against thetwo-sided alternative that the true mean amount of rainfall fromthe seeded clouds is not 750 acre-feet.
- Continuing with the data in Exercise 1, test whether cloudseeding with silver nitrate increases rainfall amounts with a 1%level of significance. Be sure to state the P-value inyour report. (Sec. 7.1 and 7.2
