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Therefore , if the results of the experimental group differ from the control group , the difference must be due to the hypothesized manipulation , rather than some outside factor . Look for the variables and controls in the examples that follow . To test the first hypothesis , the student would find out if the air conditioning is on . If the air conditioning is turned on but does not work , there should be another reason , and this hypothesis should be rejected . To test the second hypothesis , the student could check if the lights in the classroom are functional .
Please check all the words that can be used instead of the target word in the same context. Note that the morphology of the target (third person singular, past tense etc.) is considered to be applied to the candidate automatically in the process of paraphrasing.