Student 3: “In front of my class is a yard it is so big and large.” The correct one is “In front
of my class is a yard. It is so big and large.” Total of students‟ errors in run on
sentence is 4, and then the grand total of errors occured is 588. The data can be
percentage by the formula as follow:
P = × 100 P = × 100 = 0.7
B. Interpretation
In this part, the writer will interpret the grammatical errors that students made and its sources as follows:
Table 4.2 Precentage of Types of Error
No. Category
Frequency of Error Percentage of Error
1. Word choice
123 20.9
2. Omission
68 11.6
3. Punctuation
60 10.2
4. Verb tense
57 9.7
5. Capitalization
42 7.2
6. Addition
39 6.6
7. Spelling
37 6.3
8. Word form
34 5.8
9. Word order
33 5.6
10. Singular-Plural
32 5.4
11. Article
23 3.9
12. Incomplete Sentence
22 3.7
13. Meaning not Clear
14 2.4
14. Run on Sentence
4 0.7
Total N=588
100
Diagram 4.1 Percentage of Types of Error
From the table and diagram above, it can be seen that the grammatical errors made by students of second year of MTsN SA Balaraja are the highest is word
choice, 20,9, and the lowest is placed by run on sentence, 0,68.
Table 4.3 Percentage of Sources of Error
Types of Errors Frequency
of Error Category
Frequency of Sources
of Error Percentage of
Sources of Error
Word choice 123
Interlingual Transfer
322 54,76
Omission 68
Article 23
Addition 39
Singular-Plural 32
Spelling 37
Verb tense 57
Word form 34
Intralingual Transfer
160 27,21
Word order 33
Incomplete sentence 22
Meaning not clear 14
Capitalization 42
Context of Learning
106 18,03
Punctuation 60
Run-on Sentence 4
Total 449
Total 558
100
Diagram 4.2 Percentage of Sources of Error
From the table and diagram above, it can be seen that the sources of error made by students of second year of MTsN SA Balaraja are the highest is
interlingual transfer, 64,76, secondly intralingual transfer, 27,21, and the lowest is placed by context of learning, 18,03.
According to the two tables and the two diagram above, the writer calculates result into percentage and it is known that the highest grammatical error
were made by students in descriptive writing is word choice, 20,9, and the lowest is placed by run on sentence, 0,7. Besides, the highest sources of error in
