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Which experiment method is important for controlling bias ?

Which experiment method is important for controlling bias ?-example-1
User Lamefun
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2 Answers

2 votes

Answer:

B

Step-by-step explanation:

got it right

User Nart
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The answer is C. Because if you let them pick their group it will be their opinion so it will be biased.And the other two wouldnt help at all.Therefore C is the answer Good luck :)

User Cynistersix
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