In an experiment, 10 participants were given a test of mental performance in stressful
situations. Their scores were 2, 2, 4, 3, 0, 2, 7, 5, 8, and 3. Ten other participants were given
the same test after they had been trained in stress-reducing techniques. Their 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?
