Solution for QID #28926: A new gasoline substitute has been developed. An experiment | StudyHelpMe

A new gasoline substitute has been developed. An experiment is to be conducted to determine whether the new gas gives a better gas mileage to older vehicles than newer models, it was determined that car models are associated with gas mileage, but car color is not. How would blocking best be used? (1 point)   By blocking on car color   By blocking on car model   By blocking on mileage   By blocking on gas type