I want to study the effect of different teaching styles on exam grades. I split the class into 3 groups and give each group a different style of lecture (Online, in-person, Hybrid) and measure scores on an Exam. The results are below. Please analzyse these results using appropriate statistical analysis. Was any group better or worse? Which groups showed significant improvement if any?

Online	In-Person	Hybrid
75	88	76
60	84	72
64	81	73
88	X	79
71	86	66