A well-known standardized intelligence test has a population mean score of 100 and a standard deviation of 15. A team of psychologists at a university are testing a cognitive enhancement technique they developed. They hypothesize that people who undergo their cognitive enhancement technique will have higher scores on the intelligence test than the general population. The team tested their technique on a group of 30 volunteers. After undergoing the cognitive enhancement technique, the volunteers took the intelligence test. The average score of the group was 108. Use the One-Sample Z-score for means to test the researchers hypothesis. Show all your work