A professor compared differences in class grades between students in her class who a first years, sophomores, juniors, and seniors in college. Which statistical tests is appropriate for this study and...

A professor compared differences in class grades between students in her class who a first years, sophomores, juniors, and seniors in college. Which statistical tests is appropriate for this study and why? (By using the decision tree). A. Z test B. Single sample t test C. Two independent samples t test D. Two related samples t test E. One way between subjects ANOVA F. Correlation