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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
237Data Analysis and Statistical Testing
relationship between the two attributes. Thus, chi-square test is an appropriate
test for checking the independence of the two attributes.
Step 3: Apply test and calculate p-value.
Calculate the expected frequency of each cell according to the following formula:
E
NN
N
row,column
rowcolumn
=
×
Table6.19shows the calculated expected frequency of each cell.
Now, calculate the chi-square value for each cell according to the following
formula as shown in Table6.20:
χ
2
2
=
()
O
ij ij
ij
E
E
Finally, calculate the overall
χ
2
value by adding all corresponding
χ
2
values of
each cell.
χ
2
0 017 0 018 0 093 0 022 0 023 ...
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Publisher Resources

ISBN: 9781498719735