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What are the relative frequencies to the nearest hundredth of the columns of the two-way table?

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?

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41