Field trip the first day of the members paid $30 for transportation plus $13 per ticket to the platinum the second day they paid $95 for transportation +10 per ticket for the geology museum right expression to represent the total cost of dollars for two days for the n of members

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?