In an experiment, 10 participants were given a test of mental performance in stressful situation. There scores were 2,2,4,1,4,3,0,2,7 and 5. 10 other participants were given the same test after they had been trained in stress reducing techniques. There scores were 4,4,6,0,6,5,2,3,6 and 4. DO the appropriate t-test to determine if the group that had been trained had different mental performance scores than the group that had not been trained in stress reduction techniques. What do these results mean?