Could someone help me with question 4?

In an experiment to investigate the effect of color of paper (blue, green, orange) on response rates for questionnaires distributed by the \"windshield method\" in supermarket parking lots, 17 representative supermarket parking lots were chosen in a metropolitan area and each color was assigned at random to these lots. The response rates (in percent) follow. Color Response rate (in percent) Blue 27, 26, 30, 27, 34, 29 Green 34, 28, 25, 30, 29 Orange 31, 24, 27, 29, 28, 33 Assume that the oneway ANOVA model is appropriate. 1. Prepare aligned dot plots of the data. Do the factor level means appear to differ? Does the variability of the observations within each factor level appear to be approximately the same for all factor levels? 2. Compute the fitted values and residuals. 3. Conduct a test to determine whether or not the mean response rates for the three colors differ. Use level of significance at = 0.05. State the alternatives, decision rule, and conclusion. 4. When informed of the findings, an executive said: \"See? l was right all along. We might as well print the questionnaires on plain white paper, which is cheaper.\" Does this conclusion follow from the findings of the study? Discuss