A researcher was interested in undergraduate students' depression level (rated on a scale of 1-10, 1 refers to" no pressure", 10 refers to "extremely under a lot pressure) based upon their ranking (freshman, sophomores, and juniors). The researcher recruited a total of 15 participants: 5 freshmen, 5 sophomores, 5 juniors.Given the significant ANOVA, Fisher's Post-Hoc test for this study. Set = .05.

Freshman Sophomores Juniors

SX₁ = 16 SX₂ = 24 SX₃ = 33

n₁= 5 n₂ = 5 n₃ = 5

MS_error (within) =2

What is the critical value for the above test?

Compute all pairwise comparisons.

Interpret findings/results.