Serum nitrite concentrations (in μmol/L) were compared between a group of unmedicated HIV+ subjects (n =7) and a control group (n = 10). The HIV+ distribution is strongly skewed.a) Use a Wilcoxon-Mann-Whitney U test to determine if there is convincing evidence at α = 0.05 thatserum nitrite levels differ between the two populations. b) What would have been the U test p-value if researchers had instead hypothesized that serum nitriteconcentrations would tend to be larger in the HIV+ population? HIV+ Control 0.266 0.167 0.269 0.201 0.299 0.205 0.335 0.232 0.503 0.234 0.846 0.260 0.946 0.268 0.288 0.301 0.305
Serum nitrite concentrations (in μmol/L) were compared between a group of unmedicated HIV+ subjects (n =7) and a control group (n = 10). The HIV+ distribution is strongly skewed.a) Use a Wilcoxon-Mann-Whitney U test to determine if there is convincing evidence at α = 0.05 thatserum nitrite levels differ between the two populations. b) What would have been the U test p-value if researchers had instead hypothesized that serum nitriteconcentrations would tend to be larger in the HIV+ population? HIV+ Control 0.266 0.167 0.269 0.201 0.299 0.205 0.335 0.232 0.503 0.234 0.846 0.260 0.946 0.268 0.288 0.301 0.305
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Serum nitrite concentrations (in μmol/L) were compared between a group of unmedicated HIV+ subjects (n =
7) and a control group (n = 10). The HIV+ distribution is strongly skewed.
a) Use a Wilcoxon-Mann-Whitney U test to determine if there is convincing evidence at α = 0.05 that
serum nitrite levels differ between the two populations.
b) What would have been the U test p-value if researchers had instead hypothesized that serum nitrite
concentrations would tend to be larger in the HIV+ population?
| HIV+ | Control |
|
0.266 |
0.167 |
| 0.269 | 0.201 |
| 0.299 | 0.205 |
| 0.335 | 0.232 |
| 0.503 | 0.234 |
| 0.846 | 0.260 |
| 0.946 | 0.268 |
| 0.288 | |
|
0.301 |
|
|
0.305 |
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