Fig. 2

Students’ responses based on satisfaction with online classes. Group 1 consisted of students who answered “Mostly agree” and “Agree.” Group 2 consisted of students who answered “Neutral.” Group 3 consisted of students who answered “Disagree” and “Mostly disagree.” The scores were presented as a 5-point Likert scale. The group differences were evaluated by the Kruskal-Wallis test and Mann-Whitney U test, post-hoc analysis. Different case letters indicate statistically difference (p < 0.0167)