Action disabled: register
test_of_homogeneity_of_variances
data file: hs1.sav
DV: write writing score
IV: type of school (academic/general/vocational)
Descriptives writing score N Mean Std. Std. 95% Minimum Maximum Dev. Error Confidence Interval for Mean Lower Upper academic 105 56.2571 7.94334 .77519 54.7199 57.7944 33.00 67.00 general 45 51.3333 9.39778 1.40094 48.5099 54.1567 31.00 67.00 vocati 50 46.7600 9.31875 1.31787 44.1116 49.4084 31.00 67.00 Total 200 52.7750 9.47859 .67024 51.4533 54.0967 31.00 67.00
이 때 homogeneity of variance test는
H1: $\sigma^2_{\text{academic}} \neq \sigma^2_{\text{general}} \neq \sigma^2_{\text{vocati}}$
H0: $\sigma^2_{\text{academic}} = \sigma^2_{\text{general}} = \sigma^2_{\text{vocati}}$
Test of Homogeneity of Variances writing score Levene Statistic df1 df2 Sig. 1.726 2 197 .181
Sig. (p value)가 .05보다 작지 않으므로 영가설 부정에 실패. 즉, 세 그룹 간 variance에 차이가 없다고 이야기 할 수 있다.
프로그램 별로 라이팅능력에 차이가 있는 것으로 나타났다 (F(2,197) = 21.275, p < 0.001).
test_of_homogeneity_of_variances.txt · Last modified: 2016/06/08 17:19 by hkimscil