
262 Empirical Research in Software Engineering
Solution:
Step 1: Formation of hypothesis.
In this step, null (H
0
) and alternative (H
a
) hypotheses are formed. The hypoth-
eses for the example are given below:
H
01
: The performance of T1and T2techniques do not differ signicantly.
H
a1
: The performance of T1and T2techniques differ signicantly.
H
02
: The performance of T1and T3techniques do not differ signicantly.
H
a2
: The performance of T1and T3techniques differ signicantly.
H
03
: The performance of T1and T4techniques do not differ signicantly.
H
a3
: The performance of T1and T4techniques differ signicantly.
Step 2: Select the appropriate ...