Question: Exxon Oil Company is trying to develop an additive that will make cars save fuel. There are three potential composites, codenames: Greta100, Greta200, Greta500. However,

Exxon Oil Company is trying to develop an additive that will make cars save fuel. There are three potential composites, codenames: Greta100, Greta200, Greta500. However, the composites interact with ethanol, so Exxon needs to know how effective the additive is when added to 0%, 5%, and 10% ethanol gasoline. To test the mixtures, Exxon provided you with four car models: Ferrari Maserati, Lamborghini Aventador, Ford Fiesta, Toyota RAV-4. They also made available a 50-km circuit for you to test the cars.

(a)What is the experimental unit in this study?

(b)What is/are the factors in this experiment?

(c)List all treatments for this experiment.

(d)Identify the response variable and how you would measure it.

(e)Identify whether or not the study involves: [4 marks] (1) blinding; (2) blocking. For each, briefly explain why or why not.

(f)Do you need to randomize the experiment? If yes, randomize what and why? If no, explain why not.

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