In an experiment to investigate the performance of four different brands of spark plugs intended for use on a 125-cc two-stroke motorcycle, five plugs of each brand were tested for the number of miles (at a constant speed) until failure. The partial ANOVA table for the data is given here:
Mean square f of Error: 14714.69
Sum of squares of Total: 310500.76
Using these figures, state the relevant hypotheses, and carry out a test by obtaining as much information as you can about the P-value. And compute MSTr(mean square for treatments).
