3.5 Data Analysis
The data obtained from the different instruments are analyzed and interpreted quantitatively and qualitatively.
3.5.1 Quantitative Data Analysis
The quantitative data analysis was carried out with the data obtained from the oral presentation tests. The statistical method employed to compare the students’ English achievement was the t-test to measure improvement of speaking ability after using the DSW. Lastly, the evaluation the courseware efficiency was calculate based on Brahmawong E1/E2 formula with criteria of 80/80 standard.