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CHAPTER IV THE RESULT OF THE STUDY
A. The Description of the Data
After conducting the data collection, the writer obtains the desired data. They are in the form of scores on English vocabulary mastery test, namely: pre-
test and post test scores. These data come from the experimental group X
1
and control group X
2
. The detailed description of the students’ scores from two groups can be
seen as follows: 1. Pre-test Scores
a. Experimental Group X
1
The data of the test show that the highest score of the pre-test is 7.33, while the lowest one is 3.67. The mean of the scores is 5.15, the median is
4.68, the mode is 4.68, and the standard deviation is 0.85. The range of them is 0 to 10. The following are tables of frequency of distribution and
figures of histogram and polygon of the experimental group. Table 2
Frequency of Distribution of Pre-test Scores of the Experimental Group.
Class Limits M idpoint
Frequency Absolute
Frequency Relative
Frequency
3.67-4.28 3.98
4 11.76
4.29-4.90 4.60
7 20.59
4.91-5.52 5.22
13 38.24
5.53-6.14 5.84
6 17.65
6.15-6.76 6.46
3 8.82
6.77-7.38 7.08
1 2.94
Total
34 100
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Figure 1: The Histogram and the Polygon of the Frequency of Distribution of the Pre-test Scores of the Experimental Group.
14 12
10 8
6 4
2
Notes:
3,975 4,595
5,215 5,835
6,455 7,075
Groupof Score
is histogram is polygon
b. Control Group X
2
The data of the test show that the highest score of the pre-test is 6.33, while the lowest one is 2.00. The mean of the scores is 4.85, the median is
4.52, the mode is 5.85, and the standard deviation is 1.11. The range of them is 0 to 10. The following are tables of frequency of distribution and
figures of histogram and polygon of the control group. Table 3
Frequency of Distribution of Pre-test Scores of the Control Group.
No. Class Limits
Midpoint Absolute
Frequency Relative Frequency
1 2.00-2.72
2.36 3
8.3 2
2.73-3.45 3.09
1 2.8
3 4.46-4.18
3.82 2
5.6 4
4.19-4.91 4.55
11 30.6
5 4.92-5.64
5.28 7
19.4 6
5.65-6.37 6.01
12 33.3
Total 36
100
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Figure 2: The Histogram and the Polygon of the Frequency of Distribution of the Pre-test Scores of the Control Group.
1 4 1 2
1 0 8
6 4
2
Notes:
2 ,3 6 3 ,0 9
3 ,8 2 4 ,5 5
5 ,2 8 6 ,0 1
Group of Score
is histogram is polygon
2. Post test Scores a. Experimental Group X
1
The data of the test show that the highest score of the post test is 10, while the lowest one is 4.67. The mean of the scores is 7.76, the median is 7.45,
the mode is 8.06, and the standard deviation is 1.19. The range of them is 0 to 10. The following are tables of frequency of distribution and figures
of histogram and polygon of the experimental group. Table 4
Frequency of Distribution of Post test Scores of the Experimental Group.
No. Class Limits
Midpoint Absolute
Frequency Relative Frequency
1 4.67-5.57
5.12 2
5.88 2
5.58-6.48 6.03
4 11.76
3 6.49-7.39
6.94 6
17.65 4
7.40-8.30 7.85
8 23.53
5 8.31-9.21
8.76 12
35.29 6
9.22-10.12 9.67
2 5.88
Total 34
100
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Figure 3: The Histogram and the Polygon of the Frequency of Distribution of the Post-test Scores of the Experimental Group.
14 12
10 8
6 4
2
Notes: 5,12
6,03 6,94
7,85 8,76
9,67 Group of Score
is histogram is polygon
b. Control Group X
2
The data of the test show that the highest score of the post test is 8.67, while the lowest one is 4.67. The mean of the scores is 6.58, the median is
6.14, the mode is 5.85, and the standard deviation is 1.16. The range of them is 0 to 10. The following are tables of frequency of distribution and
figures of histogram and polygon of the control group. Table 5
Frequency of Distribution of Post-test Scores of the Control Group.
No. Class Limits
Midpoint Absolute
Frequency Relative Frequency
1 4.67-5.32
4.9 5
13.89 2
5.33-5.98 5.6
4 11.11
3 5.99-6.64
6.3 9
25 4
6.65-7.30 6.9
5 13.89
5 7.31-7.96
7.6 8
22.22 6
7.97-8.62 8.3
4 11.11
7 8.63-9.28
8.9 1
2.78
Total 36
100
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Figure 4: The Histogram and the Polygon of the Frequency of Distribution of the Post test Scores of the Control Group.
10 9
8 7
6 5
4 3
2 1
4.9 5.6
6.3 6.9
7.6 8.3
8.9 Group of Score
Notes: is histogram
is polygon
B. Hypothesis Testing
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