The makers of Country Boy Corn Flakes are thinking about changing the packaging of the cereal in the hope of improving sales. In an experiment, ­ve stores of similar size in the same region sold Country Boy Corn Flakes in different-shaped containers for 2 weeks. Total packages sold are given in the following table. Using a 0.05 level of signi­cance, shall we reject or fail to reject the hypothesis that the mean sales are the same, no matter which box shape is used?

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Rectangle Pyramid Cube 120 Cylinder 110 165 74 115 88 62 98 65 180 110 125 95 96 66 87 83 71 85 118