Four different brands of margarine were analyzed to determine the level of some unsaturated fatty acids (as a percentage of fats; see table below). Test to compare the four groups simultaneously. Use αα = 0.05. Brand Fatty Acids (%) A 13.5 13.4 14.1 14.2   B 13.2 12.7 12.6 13.9   C 16.8 17.2 16.4 17.3 18.0 D 18.1 17.2 18.7 18.4   State clearly your null and alternative hypothesis. Write your conclusion afterward.

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