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--- test_of_homogeneity_of_variances [2016/06/07 12:12] – created hkimscil
+++ test_of_homogeneity_of_variances [2016/06/08 17:19] (current) – hkimscil
@@ Line 1: / Line 1: @@
-<code>Test of Homogeneity of Variances
+data file: {{:spss_tutorial:hs1.sav}}
-writing score
+DV: write writing score
-Levene Statistic	df1	df2	Sig.
+IV: type of school (academic/general/vocational)
-.726			2	197	.181
-</code>
 <code>Descriptives
@@ Line 17: / Line 15: @@
 Total		200	52.7750	9.47859	.67024	51.4533	54.0967	31.00	67.00
 </code>
+이 때 **homogeneity of variance** test는 \\ \\
+H1: $\sigma^2_{\text{academic}} \neq \sigma^2_{\text{general}} \neq \sigma^2_{\text{vocati}}$ \\
+H0: $\sigma^2_{\text{academic}} = \sigma^2_{\text{general}} = \sigma^2_{\text{vocati}}$
+<code>Test of Homogeneity of Variances
+writing score
+Levene Statistic	df1	df2	Sig.
+.726			2	197	.181
+</code>
+Sig. (p value)가 .05보다 작지 않으므로 영가설 부정에 실패. **즉, 세 그룹 간 variance에 차이가 없다고 이야기 할 수 있다.**
+<WRAP box info>
+프로그램 별로 라이팅능력에 차이가 있는 것으로 나타났다 (F(2,197) = 21.275, p < 0.001).
+</WRAP>