Paired Wilcoxon Rank-Sum Test for Mean Comparison 1
(Also called as Mann-Whitney Test)
Obs Alloy Stress
1 1 3238
2 1 3254
3 1 3195
4 1 3229
5 1 3246
6 1 3225
7 1 3190
8 1 3217
9 1 3204
10 1 3241
11 2 3261
12 2 3248
13 2 3187
14 2 3215
15 2 3209
16 2 3226
17 2 3212
18 2 3240
19 2 3258
20 2 3234
Paired Wilcoxon Rank-Sum Test for Mean Comparison 2
(Also called as Mann-Whitney Test)
The NPAR1WAY Procedure
Wilcoxon Scores (Rank Sums) for Variable Stress
Classified by Variable Alloy
Sum of Expected Std Dev Mean
Alloy N Scores Under H0 Under H0 Score
---------------------------------------------------------------------
1 10 99.0 105.0 13.228757 9.90
2 10 111.0 105.0 13.228757 11.10
Wilcoxon Two-Sample Test
Statistic 99.0000
Normal Approximation
Z -0.4158
One-Sided Pr < Z 0.3388
Two-Sided Pr > |Z| 0.6776
t Approximation
One-Sided Pr < Z 0.3411
Two-Sided Pr > |Z| 0.6822
Z includes a continuity correction of 0.5.
Kruskal-Wallis Test
Chi-Square 0.2057
DF 1
Pr > Chi-Square 0.6501