Lower Upper Pretest Equal
variances assumed
.543 .464 1.432
58 .158 5.000
3.492 -1.990 11.990 Equal
variance s not
assumed 1.432 57.870 .158
5.000 3.492 -1.991 11.991
Based on the table above, it showed the resultof the t-test for pre-test. The table 4.8 showed the mean of pre-test M
12
, standard deviasion SD
12
and standarrd error mean SE
M12
on both experimental and controlled classes. Furthermore table 4.9 showed the result of t-test. Since the pre-test was
homogenous because Levenes Test showed p=0.464, then it was greater than 0.05 p0.05. Therefore the t-test showed in equal variances assumed. The t-test of
pre-test result was 0,158 p=0.158, in other words p was greater than 0.05 p0.05. From the result it meant that the the null hypotheisis was accepted, there
were no significance differences between both experimental and controlled classes in pre-test.
2. Post-test
Tabel 4.10
Group Statistics
Class N
Mean Std. Deviation
Std. Error Mean Posttest Eksperiment
30 72.87
11.150 2.036
Control 30
68.27 10.221
1.866
Tabel 4.11
Independent Samples Test
Levenes Test for Equality of
Variances t-test for Equality of Means
F Sig.
t Df
Sig. 2-
taile d
Mean Differe
nce Std.
Error Differe
nce 95
Confidence Interval of the
Difference Lower Upper
Posttest Equal variances
assumed .281
.598 1.666
58 .101 4.600
2.762 -.928 10.128
Equal variance
s not assumed
1.666 57.567 .101 4.600
2.762 -.929 10.129
Based on table 4.10 M
1
was 72.87 and M
2
was 68.27. If it was compared with mean score in pre-test the result showed the improvement 12.94 points in
experimental class and 13.34 poin in controlled class. It meant that controlled class had greater improvement of mean score 0.4 poin. It also showed that SD
1
was 11.150 and SD
2
was 10.221. Then Standard error mean in experimental class SE
M1
result was 2.036 and in controlled class SE
M2
was 1.866. In table 4.11 it showed the t-test result at post-test. Based on Levenes Test
above showed p=0.598, it was greater than 0.05 that meant the post-test data was homogenous. Since the data was homogenous, then the t-test could be showed at
equal variance assumed. The t-test of post-test was 0.101 p=0.101, It meant that p was greater than 0.05 p0.05. Based on the result it meant that null hypothesis
was accepted, there were no significance differences between experimental class and controll class in post test. The table also showed degree of freedom df
presented 58 with significant level 5, it meant the t
table
was 1.672. While based on table t
was 1.666, it meant t t
table
1.6661.672.
3. Gained Score
Tabel 4.12
Group Statistics
Class N
Mean Std. Deviation
Std. Error Mean Gained
Eksperiment 30
14.27 9.078
1.657 Control
30 12.67
6.915 1.262
Tabel 4.13
Independent Samples Test
Levenes Test for Equality of
Variances t-test for Equality of Means
F Sig.
t Df
Sig. 2-
taile d
Mean Differe
nce Std.
Error Differe
nce 95
Confidence Interval of the
Difference Lower Upper
