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Trisha and Angeline want to do an experiment to see an expensive brand of mouse food is better for mice than a cheaper variety. They have twelve mice that they divide into "Group A" and "Group B." They
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Trisha and Angeline want to do an experiment to see an expensive brand of mouse food is better for mice than a cheaper variety. They have twelve mice that they divide into "Group A" and "Group B." They decide to keep track of the following:

User Arabia
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Answer: A.

Step-by-step explanation:

User Nick Hingston
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