The article Origin of Precambrian Iron Formations(Econ. Geology, 1964: 10251057) reports the followingdata on total Fe for four types of iron formation(15carbonate, 25silicate, 35magnetite, 45hematite).1: 20.5 28.1 27.8 27.0 28.0 25.2 25.3 27.1 20.5 31.32: 26.3 24.0 26.2 20.2 23.7 34.0 17.1 26.8 23.7 24.93: 29.5 34.0 27.5 29.4 27.9 26.2 29.9 29.5 30.0 35.64: 36.5 44.2 34.1 30.3 31.4 33.1 34.1 32.9 36.3 25.5Carry out an analysis of variance F test at significancelevel .01, and summarize the results in an ANOVA table.

#complex data analysis examples #A machine that mass produces rubber gaskets can be set at one of three different #speeds: 100, 150 or 200 askes per minute. As part of a quality control study, the #machine was monitored several different times at each of the three speeds and the number #of defectives produced per hour was recorded. The data are provided in the table. Since #the number of defectives (y) is thought to be linearly related to speed (x). #(a) fit the model using the least squares method. Is there evidence that the model is useful for predicting y #(b) plot the residuals from model (a) against x. What do you say about the residual plot #(c) Find an appropriate model to fit the data. Put down your prediction equation. What did you improve #plot the residuals