Question

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 Square	F
Treatments
Error		235953.04		N/a
Total		314659.61	N/A

Answer 1