A professor would like to know if the transition to online learning during the pandemic has had an effect on test scores. It is possible that the online modality has made it harder to learn, and therefore test scores have gone down. It is also possible that the online modality has made it easier to cheat, and therefore test scores have gone up. The semester prior to the pandemic, the average score on a test in her class was 78 with a standard deviation of 18. This semester, using a sample of 25 test scores, she gets an average of 82. What should the professor conclude about the test scores in her class? Use the .05 level of significance.