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Empirical Research in Software Engineering
book

Empirical Research in Software Engineering

by Ruchika Malhotra
March 2016
Intermediate to advanced content levelIntermediate to advanced
498 pages
18h 20m
English
Chapman and Hall/CRC
Content preview from Empirical Research in Software Engineering
252 Empirical Research in Software Engineering
use the Wilcoxon–Mann–Whitney test for comparing the differences among
coupling values of an academic and open source software.
Step 3: Apply test and calculate p-value.
In this example, n
1
=4,n
2
=5,and N=9. Table6.33shows the arrangement of
all the observations in ascending order, and the ranks allocated to them.
Sum of ranks assigned to observations in Academic software (T
1
)=4+6+8+9=27.
Sum of ranks assigned to observations in open source software
(T
2
)=1+2+3+5+7=18.
The U-statistic is given below:
U=n.n+
nn+
T
12
11
1
1
2
+
+1
2
()
=
()
−=
45
44
27 3.
U=n.n+
nn+
T
12
22
2
1
2
=+
+1
2
()
()
−=
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Publisher Resources

ISBN: 9781498719735