
232 Empirical Research in Software Engineering
Step 4: Dene signicance level.
After obtaining p-value, we need to decide the threshold or α value. Hence, it
can be seen that the results are statistically signicant at 0.01signicance value
for two-tailed test and 0.005for one-tailed test.
It is important to note that we will apply two-tail signicance in all other
examples of the chapter.
Step 5: Derive conclusions.
As computed in Step 4, the results are statistically signicant at 0.01α value.
Hence, we reject the null hypothesis and conclude that the average modules in a
given software are statistically signicantly different than 12 ...