Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. at α = .01, is the degree of certainty independent of credits earned? credits earned very uncertain somewhat certain very certain row total 0 – 9 12 9 3 24 10 – 59 8 3 9 20 60 or more 1 7 12 20 col total 21 19 24 64