Homogeneity of Pre-Test and Post-Test
is the score of progress after classes are given the treatment. It takes from score of post-test minus score of pre-test. The result of t-test from gained score is as
bellow:
Table 4.9 Gained Score Group Statistics
Class N
Mean Std.
Deviation Std. Error
Mean Experiment
35 11.7714
8.06986 1.36406
Control 35
3.8286 11.74605
1.98545
Table 4.10 Independent Samples Test of Gained score
Levenes Test
for Equality of
Variances t-test for Equality of Means
F Sig.
T Df
Sig. 2- tailed
Mean Difference
Std. Error Difference
95 Confidence Interval of the Difference
Lower Upper
Equal variances assumed
.286 .595 3.297 68 .002
7.94286 2.40887
3.13604 12.74968
Equal variances not assumed
3.297 60.249 .002 7.94286
2.40887 3.12481
12.76090
Based on table 4.10 sig. 2 tailed of post-test was 0.002 p = 0.002. It means that p 0.05 or p
α. Moreover, the table also showed that df degree of freedom was 68. The value of
with df 68 was 1.668. Then was
3.297, it means that 1.668 3.297. Therefore null hypothesis
was rejected and alternative hypothesis was accepted. This result is supported the result of t-test based on post test score. In other words, the result approve that
there was significant effect of using TGT on teaching reading descriptive text.