Fig. 7

Percentage of biology majors (black bars) versus nonmajors (white bars) who consider one of the following explanations about the origin and development of life on Earth should be taught in science classes: A = evolution, B = equal time to evolution, creationism, intelligent design, C = do not know enough to say. Comparisons within institutions: a RWU biology majors (n = 237) versus nonmajors (n = 239), Chi-square = 7.5, df = 2, P = 0.02. b PC biology majors (n = 212) versus nonmajors (n = 143), Chi-square = 0.553, df = 2, P = 0.75. c RWU within-biology-majors comparisons: F = freshman (n = 93), So = sophomore (n = 74), J = junior (n = 33), Sr = senior (n = 37), Chi-square = 22.542, df = 6, P ≤ 0.001; linear regression choice A: r = 0.94, P = 0.059, choice B: r = 0.95, P = 0.044. d PC within-biology-majors comparisons: F = freshman (n = 70), So = sophomore (n = 34), J = junior (n = 50), Sr = senior (n = 58), Chi-square = 35.809, df = 6, P ≤ 0.001; linear regression choice A: r = 0.94, P = 0.054, choice B: r = 0.94, P = 0.052