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For questions # 5 & 6 determine the experimental design used. Give reasons for your answer in each case. 5. A researcher wants to conduct a study to compare the lasting quality 3 different paints (P1, P2, P3) being considered for lane marking on highways. There are 12 sections of highway available for applying the paint. Each type of paint is randomly assigned to 4 of the highway sections. 6. The relationship between 6 different doses of a drug that increases blood pressure and the actual amount of increase in mean diastolic blood pressure was investigated in a laboratory experiment. 12 rabbits all received, in random order, the 6 different dose levels of the drug, with a suitable interval between each drug administration For the study in question #5, (to compare the lasting quality of 3 different paints (P1, P2, P3) being considered for lane marking on highways with 12 sections of highway available for testing), specify a different design that might be used and explain why it might be less efficient or more efficient. 7.

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