An advertising executive wanted to know whether a new ad campaign designed to inform teenagers about the dangers of vaping was working. Teenagers who take a knowledge test about the dangers of vaping score an average of 50 (population mean) with standard deviation of 8. A sample of 100 teenagers viewed the ad. Their mean score was 52. Based on this information, does it seem like the ad campaign worked to increase knowledge of the dangers of vaping? Explain your answer. HINT: Your explanation should include a z score that describes the sample AND an explanation for your conclusion about whether the ad campaign worked.