Average and standard deviation and statistical significance tests to compare the differences in the skill of listening to the English between before and after the experiment. Using the formula t-test
Find the mean and standard deviation. And tests of statistical significance. To compare the different scores between English listening proficiency skills before and after the experiment by using t-test.
Average and standard deviation And the test is statistically significant To compare the difference of scores on English listening skills can be between before and after the experiment. By using the formula of t-test