Table 2. Descriptive Statistics and Correlations Between the Predictors and Academic Performance Measures.
Variable | M | SD | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
---|---|---|---|---|---|---|---|---|---|
Admission tests | |||||||||
1. Trial-studying test | 29.7 | 5.2 | .81 | ||||||
2. Math test | 16.6 | 4.7 | .30 [.23,.37] | .76 | |||||
3. English test | 13.7 | 3.3 | .43 [.37,.49] | .21 [.14,.28] | .70 | ||||
Prior educational performance | |||||||||
4. HSMG | 6.7 | 0.44 | .45 [.33,.55] | .36 [.23,.47] | .29 [16,.41] | ||||
Academic performance | |||||||||
5.First course grade | 6.6 | 1.4 | .56 [.50,.61] | .20 [.12,.27] | .34 [.27,.41] | .55 [.45,.64] | |||
6. FYMG | 6.6 | 1.3 | .49 [.43,.55] | .29 [.22,.36] | .25 [.18,.32] | .52 [.41,.61] | .75c [.71,.78] | ||
7. Credits | 46.0 | 20.2 | .39 [.32,.55] | .20 [.13,.27] | .16 [.09,.23] | .30 [.17,.42] | .62c [.57,.67] | .82 [.79,.84] | |
8. Drop-outa | 0.20b | -.32 [-.39,-.25] | -.15 [-.22,-.08] | -.13 [-.20,-.05] | -.22 [-.35,-.09] | -.47 [-.53,-.41] | -.64 [-.70,-.58] | -.83 [-.85,-.81] |
HSMG, high school mean grade; FYMG, first-year mean grade. Internal consistency coefficients are on the diagonal (Cronbach’s alfa). All correlations were significant with p < .01.
95% confidence intervals for the population correlation ρ are between brackets.
aPoint-biserial correlations.
bProportion.
cFor these correlations, results on the first course were not included in the calculation of FYMG and credits.