The Correlation Between Vocabulary Mastery And Students ’ Ability In Arranging Random Words Into Good Sentence of The 2014 / 2015 Ninth Year Students of SMP Negeri 2 Stabat

The objective of the study is to find out correlation between vocabulary mastery and students’ ability in arranging random word into good sentence of the 2014/2015 ninth year students of SMP Negeri 2 Stabat.The population of the study was the 2014/ 2015 the ninth year students of SMP Negeri 2 Stabat, totaling about 199 students. It was taken 20% from 199 students. It is 40 of them randomly as the sample of the research.This research was conducted by applying the correlationaldesign. The reliability of the test is counted by using Pearson Product Moment formula. The instrument was used to collect the data were multiple choicetest consisting of 20 items and essay test consisting of 20 items. Then the writer checked and gave score for both tests. The scores then were displayed in tables. After the data had been collected and analyzed, the findings showed that the value of t observed that is 0.50 is higher than the value of the ttable. It means that the test substantially high.This finding proves the hypothesis that the vocabulary mastery significantly correlates to students’ ability in arranging random word into good sentence of the 2014/2015 ninth years students of SMP Negeri 2 Stabat.

52 differentiate its category and meaning when applying it into grammatically right sentence. In addition to this, the learner is able to express it orally as well.
Based on the description above, the writer chooses the title of the research as The Correlation between Vocabulary Mastery and Students' Ability in Arranging Random Words into Good Sentence of the 2014 / 2015 Ninth Year Students of SMP Negeri 2 Stabat.
Teaching of vocabulary is not easy to do because the English teacher should teach vocabulary English first rather than other aspects of language, such as grammar, speaking, reading and writing. If students know more vocabulary, it will be easier for them to learn other aspects of the English language. In this study the writer presents how to teach vocabulary to students so that they can help solve the problem in learning the English language. Students who have enough vocabulary are able to make sentences easily, especially in terms of preparing a random word in to a correct sentence. So that students can communicate or speak in English.
Random word is a form of exercise that is given to the student to determine the ability or mastery of the vocabulary of the students. Students' ability to arrange the words into good sentence that shows the true mastery of the vocabulary of the students. Therefore, mastery vocabulary concerned with setting up random words into acorrect sentence. Students who do not have a lot of vocabulary will get into trouble when putting together random words in to a correct sentence. In this study the writer presents also how to learn random words arranged into sentences is true that students are easier to learn and understand this lesson.

Research Design
This study is a correlational research. The writer applied the correlational research design. In this design, the writer will use the correlational statistical test to describe and measure the degree of relationship between two variables namely vocabulary mastery and students' ability in arranging random words into good sentence of grade IX students at SMP Negeri 2 Stabat in 2014/2015 academic year. The relationship between two variables namely vocabulary mastery and students' ability in arranging random words into good sentence can be drawn as follows: X Y vocabulary mastery students' ability in arranging random words into good sentence.
This figure shows that X variable (vocabulary mastery) has a correlation to Y variable (students' ability in arranging random words into good sentence).

The Population and Sample
Arikunto said, "populasi adalah seluruh unsur-unsur dari penelitian". The populations of this study are the 2014/2015 Ninth Year Students of SMP Negeri 2 Stabat. There are five classes of the ninth year grade consisting of 199 students which is showed on table 1 There are five classes of the ninth year grade consisting of 199 students. Because the population of ninth year students is more than 100 students, the writer decided to take 20% from 199 students. It is 40 of them randomly as the sample of the research. The consideration of taking such number of sample is based on what Arikunto states that if the subjects are large or more than 100, the sample can be 10 -15%, or 20 -25%, or more depending on the capability of the researcher.

The Variables of the Study
Theoretically, any two quantitative variables can be correlated as long as we have scores on these variables from the same participants. Correlational research seeks to determine the degree of relationship between two or more variables.
In this study, there are two variables which are correlated, namely vocabulary mastery and students' ability in arranging random words into good sentence of grade ninth students at SMP Negeri 2 Stabat in 2014/2015 academic year. The vocabulary mastery refers to the students' competence in understanding and using English words appropriately. Students' ability in arranging random words into good sentence means the ability of students to make the right sentence based on the structure in arranging random words into good sentence.

The Instrument of the Study
Any study needs data to support the finding of the study. The data of this study were gained through the instrument of collecting data. The instrument was by giving to the students. There are two tests which were distributed to the students based on the data needed. The data on vocabulary mastery were obtained from multiple choices test consisting of 20 items, while the data on the students' ability in arranging random words into good sentence was achieved from the essay test consisting of 20 sentences.
In scoring the students' answer for both test, the writer used the following formula: 100 question of number Total Answer Correct x

The Techniques of Data Analysis
After the students' answer sheet had been collected, then the writer checked and gave score for both tests. The scores then were displayed in tables.Since the objective of the study is to find out correlation between vocabulary mastery and students' ability in arranging random word into good sentence, therefore the data found were used to seek for the correlation between two variables. In this case, the Pearson Product Moment was applied to calculate the correlation coefficient.
The formula used in finding the correlation coefficient is as follow: XY = sum of the products of paired X and Y scores.

Data Analysis
The data on vocabulary mastery and students' ability in arranging random words into good sentence were obtained through multiple choices test and essay test were given to the students. After the giving the score on both variables, then the writer put the scores in tables.

The Score of Vocabulary Mastery
In order to get the data on Vocabulary Mastery, the writer applied Multiple Choice test. Based on the table, it was found that the Mean was 73.75. The highest score of students' ability in arranging random words into good sentence was 80 while the lowest was 65.The Correlation between Vocabulary Mastery and Students' Ability in Arranging Random Words into Good Sentence Score.To see the correlation between two

Research Finding
The data which were found from the test and tabulated in tables then were analyzed. This analysis of data was needed as the objective of the study is to find out correlation between vocabulary mastery and students' ability in arranging random word into good sentence. The writer used the scores of both test to analyze the correlation between them.
The writer applied Pearson's Product Moment formula to find out correlation between vocabulary mastery and students' ability in arranging random word into good sentence. The formula was shown below: By using the formula, correlation coefficient of both variables can be calculated as in the following: r xy = √( ) ( ) r xy = √ r xy = r xy = 0.50 From the calculation by using Pearson Product moment formula above, it was got that the correlation coefficient between two variables was 0.50. Then, to interpret the strength of the correlation coefficient, the writer used David's interpretation strength of correlation coefficient which is explained on table 3 From the table 4.4, it could be seen that the correlation coefficient of 0.50 was located between 0.50 -0.69. it means that the degree of the correlation was considered as a substantially high correlation.

The Hypothesis testing
The hypothesis of the study is that there is significant correlation between vocabulary mastery and students' ability in arranging random word into good sentence of the 2014/2015 ninth years students of SMP Negeri 2 Stabat. This hypothesis is still a tentative answer to the problem and needs to be proved or tested. To test the hypothesis, correlation coefficient of 0.50 is consulted with the critical value of the correlation with degree of freedom (df) = 40-2 = 38. The critical value with this df is 0.304 for the 0.05 level of significance. The result shows that r value or the correlation coefficient got from the data analysis is higher than the critical value (0.50 > 0.304) and the hypothesis of this study is accepted. Thus, the study proved that the vocabulary mastery significantly correlates to students' ability in arranging random word into good sentence of the 2014/2015 ninth years students of SMP Negeri 2 Stabat. The data was shown on table 4 below: