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I scientist wants to determine the effect of a new gasoline he feels one of the cars with normal gasoline and the other identical car with new gasoline which is a control group<…

I scientist wants to determine the effect of a new gasoline he feels one of the cars with normal gasoline and the other identical car with new gasoline which is a control group<…
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I scientist wants to determine the effect of a new gasoline he feels one of the cars with normal gasoline and the other identical car with new gasoline which is a control group

User Yersin
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The car with normal gasoline because the effects of that are already known. whereas the car with new gasoline is different and new.
User Josmarie
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