Based on the results of the Scheffe post hoc test, which groups of courses are significantly different?

Group 1 - 0-2 courses

Group 2 - 3-7 courses

Group 3 - 8+ courses

PROVIDED INFORMATION:

medians for each group:

M (0-2 Courses) = 2.95

M (3-7 Courses) = 2.29

M (8 + Courses) = 1.99

standard deviations for each group:

SD (0-2 Courses) = 1.02

SD (3-7 Courses) = 1.11

SD (8 + Courses) = .82

f=7.443

df=2 (between groups variance)

df=87 (within groups variance)

significance - p=.001