How Do They Do It?: Plane Painting, Clogs, Pasties

An airline wishes to estimate the weight of the paint on a fully painted aircraft of the type it flies. In a sample of four repaintings the average weight of the paint applied was 239 pounds, with sample standard deviation 8 pounds. Assuming that weights of paint on aircraft are normally distributed, construct a 99.8 % confidence interval for the mean weight of paint on all such aircraft. | Numerade

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Rare Gallery wallpaper