The Correlation Between Students’ Vocabulary Mastery and Writing Descriptive Text Ability of the Eight Grade Students in SMP Negeri 40 Palembang

The purposes were to find out the correlation between students’ vocabulary mastery and writing descriptive text and the contribution of vocabulary mastery on writing ability. The population of the study was all of the 8th grade students in SMP Negeri 40 Palembang. In choosing the sample, purposive sampling was used that involved 134 students. The data were collected by using vocabulary mastery and writing descriptive text ability tests. The data were analyzed by using Pearson Product Moment to investigate the correlation between both variables and regression analysis. The results showed that the coefficient of r-value was 0.557. The category of correlation between vocabulary mastery and writing ability showed a moderate correlation. It was found that there was significant correlation between students’ vocabulary mastery and writing descriptive text ability of the eighth grade students in SMP Negeri 40 Palembang. There was also contribution of vocabulary mastery to writing descriptive text ability of the eighth grade students as much 31%