The company which manufactures the machines claims that breakdowns of its newer model
are easier to fix. To test this claim, a sample of 18 breakdowns of the new model were
observed, resulting in a mean repair time of 86.8 minutes with a standard deviation of 14.6
minutes. Using a significance level of a = 0.10, determine if the new copy machines are faster
to repair. State clearly what your null and alternative hypotheses are, show your work, and
state your conclusion.