In an experiment to investigate the performance of four different brands of spark plugs intended for use on a 125-cc motorcycle, five plugs of each brand were tested, and the number of miles (at a constant speed) until failure was observed. A partially completed ANOVA table is given. Fill in the missing entries, and test the relevant hypotheses using a 0.05 level of significance. (Give the answer to two decimal places.) Source of Variation df Sum of Squares Mean F Square Treatments Error 237897.04 Total 319214.93 The data ---Select-- consistent with the null hypothesis.

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