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2. Determining mean variable X2 with the formula as follows: M2 =
3. Determining deviations variable X
1
with the formula: X
1
= X1 – M1
4. Determining deviation variable X
2
with formula: X
2
= X2 – M2
5. Determining t-table in significance level 5 with the formula: df = N1 + N2
– 2 F.
Statistical Hypothesis
Alternative Hypothesis Ha : If there is an increase in students’ score from
the pre-test to post-test, using peer feedback is effective to teach writing.
Null hypothesis H0 : If there is no increase in students’ score from
the pre-test to post-test, using peer feedback is not effective to teach writing.
1. t0 tt : The null hypothesis H0 is rejected and the alternative
hypothesis is accepted. 2. t0 tt
: The null hypothesis H0 is accepted and the alternative hypothesis Ha is rejected.
G. Time and Location of the Study
The study is done at SMA N 11 Kota Tangerang Selatan. The time of the study is on April 2015.
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CHAPTER IV FINDINGS AND DISCUSSION
This chapter will discover the research result from the data description and the data analysis. This chapter also discuss about the discussion of the test result
and the correclation of the result and the theories given in the second chapter.
A. Data Description
The data of students’ achievement is divided into two kinds, pre-test and post-test data which gained from experiment and control class. The result of
pre-test and post-test in both classes is presented in the table below:
Table 4.1 Pre-test and Post Test Result of Experimental and Control Class Experiment Class
Control Class Pre-test
Post-test Pre-test
Post-test
Mean 40.375
62.5625 37.875
56.125 D
ƒ 62
62 62
62 Median
40 65
38 57
Mode 40
66 20
52 Table 4.1 above shows the test score mean, degree of significance, median
and mode which gained from both classes. From the table, it can be seen that there were improvement from pre-test and post-test score of experimental and
control class data. The writer provides a graphic to ease readers to understand the significant
result of the test in experiment and control class which make the research become more valuable.
