Please solve and I'll give brainliest and 20 points
links will be reported​

Whats the name of the vertical axis

27 is what percent of 108? 27 is % of 108

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?