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Business Statistics, 3rd Edition
book

Business Statistics, 3rd Edition

by Naval Bajpai
April 2024
Intermediate to advanced content levelIntermediate to advanced
921 pages
37h 16m
English
Pearson India
Content preview from Business Statistics, 3rd Edition
Chapter 18
806
Mann–Whitney U test:
Small sample U test
Unn
nn
R
112
11
1
1
2
=+
+
()
Unn
nn
R
212
22
2
1
2
=+
+
()
Un
nU
11
22
=−
Large sample U Test
z
U
U
U
=
μ
σ
where mean m
U
=
μ
U
nn
is
12
2
and standard deviation s
U
=
nn nn
12 12
1
12
()
.
++
Wilcoxon matched-pairs signed rank test:
Wilcoxon test for large samples (n > 15)
Mean =
μ
T
nn
=
+
()
()
1
4
Standard deviation =
σ
T
nn n
=
++
()()
()
12 1
24
z
T
T
T
=
μ
σ
where n is the number of pairs and T the Wilcoxon test statistic.
Kruskal–Wallis statistic (K)
K
nn
T
n
n
j
j
j
k
=
+
−+
=
12
1
31
2
1
()
()
where k is the number of groups, n the total number of observations (items), T
j
the sum of ranks in a group and n
j
the
number of observations (items) in a group.
Friedman ...
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Publisher Resources

ISBN: 9789390168996