4.2 Descriptive Scores/Score Improvement Pattern Distributions (RQ1)
As shown in Table 4, the average improvement of total scores (post-test total score minus pre-test total score)
was 52.7. As for outliers, the maximum improvement in total score was 235, while the minimum was -120. The
distribution of improvement in total scores was normally distributed.
As shown in Table 5, the average improvement of listening scores (post-test listening score minus pre-test
listening score) was 50.5. As for outliers, the maximum improvement in total score was 140, while the minimum
was -80. The distribution of improvement in listening scores was a little skewered to the right.