Which non-parametric test for ordinal data is the best to use in the given scenario? In a study by Zuckerman and Heneghan, hemodynamic stresses were measured on subjects undergoing laparoscopic cholecystectomy. An outcome variable of interest was the ventricular end-diastolic volume (LVEDV) measured in mm. A portion of the data appears in the following table. Baseline refers to a measurement taken 5 minutes after induction of anesthesia, and the term '5 minutes' refers to a measurement taken 5 minutes after baseline. Can we conclude that, on the basis of these data, among subjects undergoing laparoscopic cholecystectomy, the average LVEDV levels change? Let a =.01.
Which non-parametric test for ordinal data is the best to use in the given scenario?
In a study by Zuckerman and Heneghan, hemodynamic stresses were measured on subjects undergoing laparoscopic cholecystectomy. An outcome variable of interest was the ventricular end-diastolic volume (LVEDV) measured in mm. A portion of the data appears in the following table. Baseline refers to a measurement taken 5 minutes after induction of anesthesia, and the term '5 minutes' refers to a measurement taken 5 minutes after baseline. Can we conclude that, on the basis of these data, among subjects undergoing laparoscopic cholecystectomy, the average LVEDV levels change? Let a =.01.
| LVEDV (ml) | ||
| Subject | Baseline | 5 minutes |
| 1 | 51.7 | 49.3 |
| 2 | 79.0 | 72.0 |
| 3 | 78.7 | 67.0 |
| 4 | 80.3 | 70.4 |
| 5 | 72.0 | 65.9 |
| 6 | 85.0 | 84.8 |
| 7 | 79.0 | 77.7 |
| 8 | 71.3 | 74.0 |
| 9 | 54.3 | 58.0 |
| 10 | 58.8 | 65.0 |
a. Mood Median Test
b. Sign Test
c. Wilcoxon Rank Sum Test
d. Wilcoxon Matched-Pair Signed-Ranks Test
e. Spearman and Kendall
f. Kruskal-Wallis Test
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