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Chemistry, 24.08.2019 05:30 Destinywall

Which of these experimental designs could lead to bias?
a) two mice are given the choice between swiss and american cheese.
b) phil and bart race down the street to determine who is the fastest.
eliminate
c) a car company pays participants to test drive and evaluate their new auto.
d) a private company uses a random taste test of three different, unidentified soft drinks.

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Which of these experimental designs could lead to bias?
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