In addition, to determine whether there was a significant difference in the mean according to level, a post-hoc test was performed to compare the difference between the levels of the group.
또한 집단의 수준간 차이를 비교하기 위해 사후검정을 실시하여 수준에 따른 평 균에 유의한 차이가 있는지 확인하였다.