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dem82 [27]
2 years ago
9

which of the following principles of experimental design ensures that the explanatory variable, and not some variable over which

the experimenter has no control, is causing observed changes in the response variable?
History
2 answers:
serious [3.7K]2 years ago
3 0
Control, I just put the answer in and got it right! 
MaRussiya [10]2 years ago
3 0

control is right yay

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Answer:

D

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Both the French and Indian War and the American Revolutionary War were fought for control of North America.

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The American Revolutionary War was fought because colonists wanted to be free from Britain, but they wanted to keep their colonies.

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Explanation:

hope it helped?

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