Biology, 23.09.2019 21:20 kendrawalraven

Scientists developed a new margarine containing plant ingredients they think will lower blood cholesterol levels in people who use the margarine. they want to test this by comparing the cholesterol levels of people who use the new margarine for a while to cholesterol levels of a group of people who use regular margarine. this is an example of what type of research design? a. intervention studyb. epidemiological study

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