7. Determining Standard Error of different Mean of Variable X and Mean of Variable Y, with formula:
√ √
√ √
8. Determining t
o
with formula:
9. Determining Degrees of Freedom df, with formula:
The value of df 78 at the degrees of significance 5 or t
table
is 1.991. 10. The Testing of Hypothesis
The statistical hypothesis of this research can be seen as: Ho : There is no significant difference
between students’ reading interest by using English teens magazine and without English teens magazine
Ha : There is a significant difference between students’ reading interest by using
English teens magazine and without English teens magazine. And then, the criteria used as follows:
1. If t-test t
o
t-table t
t
in significant degree of 0.05, Ho null hypothesis is rejected.
2. If t-test t
o
t-table t
t
in significant degree of 0.05, Ho the null hypothesis is accepted.
D. Interpretation of the Data
In the description of the data, the writer had described the data which had taken in the both classes. The table 4.1 showed the description of the pre and post-
questionnaire score in the experiment class. The result of mean score shown that the treatment class had high progressive, 47.15 in the pre-questionnaire and 74.55
in the post-questionnaire; the gain score of pre-questionnaire was 27.4. The smallest score in the pre-questionnaire was 37 and 53 in the post-questionnaire.
The highest score in the pre-questionnaire was 72 and 81 in the post- questionnaire. The table 4.3 showed the description of the score pre and post-
reading test in the experimental class which has the mean of pre-test 62.20. After giving 4 times treatments for experimental class using English teens magazine, the
writer got the mean of post-test 74.50. So, the writer got the mean of gain score 12.25. The smallest score in the pre-test was 44 and the highest score was 72.
Meanwhile, the data showed in post-test that the smallest score was 56 and the highest score was 88. It can be summerized that the lowest and the highest scores
in post-test were higher that pre-test. Furthermore, in the controlled class the,
students’ pre-questionnaire mean score was 50.52 and pre-test score was 66.7. In this class, the writer did not gave
the students English teens magazine as a reading material in the classroom, but the material is from students’ textbook. After giving 4 times treatments without using
the English teens magazine, the writer got the mean score of post-questionnaire was 53.95 and for the post-test was 69.7. The writer got the mean of gain score of
questionnaire was 3.42 and it was 3 of gain score in the reading test. It means that the gain score of experimental class was higher in the value 23.15 for the
questionnaire and 9.25 for the reading test than controlled class. The smallest questionnaire score in the pre-test was 36 and 52 for the reading test; the highest
questionnaire score was 43 and 76 in reading test score. The data showed in post- test that the smallest questionnaire score was 69 and 56 in reading test score; the
highest questionnaire score was 64 and 76 in reading test score. It can be summerized that the lowest and the highest score in post-test were also higher
than pre-test.
The last calculation was testing the hypothesis. This was the main calculation to answer the problem formulation of this research that whether there
is significant different between students’ reading interest in experiment class which given English teens magazine
and students’ reading interest in controlled class without English teens magazine. The writer compared the pre and post
questionnaire in the sample. The result was treatment class had a higher improvement than the controlled class with the gain score was 27.4. In the
treatment class, the using English teens magazine was success to improve students’ reading interest. It can be seen by the Quartile III Score Maximum
79.66 74.55 81. Meanwhile, reading interest in controlled class was less. It
can be seen by the Quartile I Score Median 43.13 53.95 56.17. Moreover, in the cognitive aspect reading achievement, the writer used
T- test formula in the significance degree α of 5. The result showed that t-test
t
o
t-table t
t
F F
αn1-1, n2-2
28.91 1.991. It means that t-test was higher in
the value 26.919 than t-table. The conclusion is the reading comprehension test for the cognitive aspect of reading interest had progressive and the questionnaire
for the affective aspect of the reading interest, too. It means that alternative hypothesis H
a
is accepted that there is a significant difference between students’
reading interest using English teens magazine and without using English teens magazine; the using English Teens Magazine is effective towards students’
reading interest.
