interview, it was revealed that the characteristics of most of the students matched up with the characteristics of monitor over-users.
4.4 The Result of the Homogeneity Test
The homogeneity test was conducted by analyzing the students‟ English score in which it was collected from the English teacher. It was done to know
whether the student s‟ were homogenous or not. The students‟ English score was
analyzed statically by using SPSS software by means ANOVA. The result of the analysis was as follow:
Table 4.24 The Descriptive of the Output
N Mean
Std. Deviation
Std. Error
95 Confidence Interval for Mean
Minimum Maximum Lower
Bound Upper
Bound XI MIPA 1
32 72.2500
1.75977 .31109 71.6155 72.8845
70.00 79.00
XI MIPA 2 34
72.7059 2.08209 .35708 71.9794
73.4324 70.00
79.00
XI MIPA 3 33
72.5152 2.20966 .38465 71.7316
73.2987 70.00
78.00
XI MIPA 4 33
72.6061 4.28617 .74613 71.0863
74.1259 65.00
82.00
XI MIPA 5 29
73.3793 4.64769 .86305 71.6114
75.1472 65.00
82.00
XI MIPA 6 34
73.0294 5.68616 .97517 71.0454
75.0134 64.00
85.00
XI SOS 1 32
72.7813 2.91530 .51536 71.7302
73.8323 69.00
80.00
XI SOS 2 32
73.6250 3.56280 .62982 72.3405
74.9095 68.00
80.00
Total 259
72.8533 3.60793 .22419 72.4118
73.2947 64.00
85.00
From the table above, it can be seen that the means of each class were quite similar. It means that every mean of each class could be put in the interval of
other class. For instance, the mean score of class XI MIPA 1 in which 72.2500 could be put in the interval of class XI MIPA 2 in which had the lower bound of
71.9794 and the upper bound of 73.4324. It happened to other classes. For this reason, it can be said that all of the classes were homogenous. Further analysis
was presented as follow:
Table 4.25 The Result of ANOVA
Sum of Squares Df
Mean Square F
Sig. Between Groups
46.478 7
6.640 .503
.832
Within Groups
3311.947 251
13.195
Total 3358.425
258
According to the table above, the value of sig. was 0,832 in which it was higher than 0,05 and it means all of the groups have same variance. In other
words, the population was homogenous. For that reason, the researcher was able to use proportional random sampling method and select some students as
representatives of each class.
4.5 Summary of the Result of Data Collection
