Grandiosa Pizza is considering a recipe change. Researchers from Grandiosa Pizza

Question

Grandiosa Pizza is considering a recipe change. Researchers from Grandiosa Pizza have been assigned to determine whether consumers are more or less likely to buy pizza with heavy spices or light spices. The researchers realize that the subjects might not like the heavy spices after tasting a pizza with light spices and vice versa.

How should the researchers decide which pizza should be tasted first?

A. There should be only one pizza available for each subject, to avoid confusing the subjects.

B. Mild pizza should always go second, because it will be a relief after the spicy pizza.

C. Mild pizza should always go first, because no one will be able to taste anything after the spicy test.

D. They should flip a coin to decide independently for each subject, to randomly assign the spicy or mild pizza in each experimental unit.

E. There should be only one type of pizza per test, to avoid confusing the subjects.

Thanks!

Explanation / Answer

E. There should be only one type of pizza per test, to avoid confusing the subjects. This is because all of the other problems mentioned are possible, so it is best to have seperate tests, and rate pizza instead of comparing the pizzas.

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