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  3. data from a cloud-seeding experiment are in the fi

Data from a cloud-seeding experiment are in the file CLOUDS on the course website. The file...

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Statistics

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.

    1. Make a boxplot of the amount of rainfall from the seededclouds. Discuss.
    2. Make a normal quantile plot of the amount of rainfall from theseeded clouds. Discuss.
    3. Find the sample mean and sample standard error of the amount ofrainfall from the seeded clouds.
    4. Report a 99% confidence interval for the mean amount ofrainfall from the seeded clouds.
    5. 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.
  2. 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

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