A farmer grows vegetables on seven acres, fruit on six acres and Flowers on two acres. Out in his fields, he finds a lady bug To the nearest tenth of a percent, what is the theoretical probability that the ladybug was not found within the acres of the flowers

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?