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Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?
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Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.
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Acheetah can run 70 per hour. what is the speed in feet per hour
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