Intravenous infusion fluids produced by three different pharmaceutical companies (Cutter, Abbott, and McGaw) were tested for their concentrations of particulate contaminants. Six samples were inspected from each company. The figures listed in the table are, for each sample, the number of particles per liter greater than five microns in diameter (183).

Do the analysis of variance to test H0: μC = μA = μM and then test each of the three pairwise sub hypotheses by constructing 95% Tukey intervals.

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Number of Contaminant Particles Cutter Abbott McGaw 255 264 342 331 234 217 105 288 98 275 221 240 577 515 214 413 401 260