User Guide

50 0
Chapter 34
Example. In general, do families receive the asking price when they sell their homes?
By applying the Wilcoxon signed-rank test to data for 10 homes, you might learn that
seven famil
ies receive less than the asking price, one family receives more than the
asking price, and two families receive the asking price.
Statistics. Mean, standard deviation, minimum, maximum, number of nonmissing
cases, and q
uartiles. Tests: Wilcoxon signed rank, sign, McNemar.
Data. Use numeric variables that can be ordered.
Assumptions. Although no particular distributions are assumed for the two variables,
the popula
tion distribution of the paired differences is assumed to be symmetric.
Figure 34-17
Two-Related-Samples output
7
1
4.93 34.50
1
2
1.50 1.50
2
3
10
Negative
Ranks
Positive
Ranks
Ties
Total
Asking Price
- Sale Price
N
Mean
Rank
Sum of
Ranks
Ranks
Asking Price < Sale Price
1.
Asking Price > Sale Price
2.
Asking Price = Sale Price
3.
-2.313
1
.021
Z
Asymptotic
Significance
(2-tailed)
Asking Price
- Sale Price
Test Statistics
2
Based on positive ranks
1.
Wilcoxon Signed Ranks
Test
2.