Problem 11.22 (altered version) Engineers are testing company eet vehicle fuel economy (miles per gallon) performance by using dierent car brands. One vehicle of each size is tested. Does this sample provide sufficient evidence to conclude that there is a signicant dierence? -_ Full-sized State the null and alternative hypotheses (include any and all hypotheses that are necessary). What is the critical value for car size? What is the critical value for brand? What is the test statistic for car size? What is the test statistic for brand? Do you reject or fail to reject for car size? Do you reject or fail to reject for brand? What conclusions can you draw (you should make multiple conclusions is you have multiple sets of hypotheses). aria-rho 999's