CHAPTER IV DATA ANALYSIS
This chapter deals with the analysis and the discussion of the vocabulary test and the questionnaire as well as the interpretation of the result.
4.1 The Analysis of the Vocabulary Test
After conducting the research, I administered, analyzed, and interpreted the result of the research. Statistical analysis is concerned with the organization of the
scores and the other numerical data collected through measurement. The following table presents the calculation of the right answers and the wrong
answers of the vocabulary test. The table shows that the students’ scores are various. The highest score is 72, the lowest score is 28 in the pre-test, and 94, and the lowest
score is 40 in the posttest.
4.1.1 The Measurement of Central Tendency
Relating to the statistical analysis that deals with the numerical data, the writer measured the central tendency, which is mean. Moor 1983:245 asserts, “The mean is
an arithmetical average that is obtained by adding all the scores in the distribution and dividing the number of testers.”
For calculating the mean, I employed the formula below:
N X
X
∑
= Where:
X = the mean scores
∑
X = the sum all the scores N = the total number f the testers
Using the formula above, the computation of the average of the pre-test and the posttest scores show below:
Pre-test
N X
X
∑
= X = 1738
39 X = 44.6
Posttest
N X
X
∑
= X = 2780
39 X = 71.19
The mean of the test scores 44,6 and 71.28 is equal to 44,6 and 71.28 of the possible highest scores. The percentage can be seen in the computation below:
44.6 = 100
= 44.6
and 71.19 = 71.19 100 100
44.6 and 71.19 = the mean of the pre-test and the post test scores
100 =
the possible
highest score
Based on the statistical analysis, the mean scores 71.19 there are 20 students’ scores above the mean and 19 students’ scores below the mean. It means that more than
48.71 of the students’ vocabulary mastery is low.
4.1.2 The Result of Vocabulary Tests
The aim of this study is to find out how high the vocabulary of the students’ achievement. I classified the students’ achievement above by using Tinambunan’s
classification 1988:129 which expresses various level of achievement. Below is the table of the level of achievement put forward by Tinambunan.
The table of the level of the achievement Percentage of the correct answer Grade
Level of the achievement 85 – 100
70 – 84 60 – 69
50- 59 - 50
A B
C D
E Very good
Good Sufficient
Insufficient Very bad
Based on the table above the achievement of the students’ pre test and the posttest are:
Table of the grading of the scores frequency
percentage grade
Pre test
Post test
Pre test
Post test
A B
C D
E 2
5 4
28 6
14 11
6 2
5.19 12.82
10.26 71.79
15.38 35.90
28.21 15.38
5.19
The graphic f the scores
20 40
60 80
Pretest Post test
Pretest 5.19
12.82 10.26 71.79 Post
test 15.38 35.9
28.21 15.38 5.19 A
B C
D E
According to the classification of the level of achievements introduced by Tinambunan, 71.19 are regarded above average. The result of test shows clearly that
only 6 students 15.38 get outstanding A, 14 students 35.90 get very good grade B, meanwhile 11 students 28.21 get satisfactory C, and 6 students 15.38
get very weak grade D, and 2 students 5.19 very bad or still fail. However, generally, it shows clearly that students’ vocabulary mastery in noun shows the highest
result whereas in verbs shows the lowest result. The following is the elaboration result of the test.
Table of the test compositions No
Aspect Words
Percentage Result Of
Test Percentage 1 Noun
24 48
18 75
2 Verb 7
14 4
67 3
Adjective 13 26
9 69
4 Preposition 6 12
5 73
Total 50
words 100 36
words 72
1.Noun
The percentage of the right answer of noun is 75 and the wrong answer is 25 . The students’ mastery in noun is about 75 x 24 = 18 words.
2.Verb
The percentage of the right answer of verb is 67 and the wrong answer is 33 . The students’ mastery in verb is about 67 x 7 = 4 words.
3.Adjective
The percentage of the right answer is 69 and the wrong answer is 31 . The students’ mastery in adjective is about 69 x 13 = 9 words.
4.Preposition
The percentage of the right answer is 73 and the wrong answer is 27 . The students’ mastery in noun is about 73 x 7 = 5 words.
4.1.3 The Findings
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