Question

The data below are comparisons of two different patches for how well they repel mosquitoes. Compare the rates of mosquito landings/hour for these two patches with the assumption that these data are not normally distributed, with an α = 0.05. Which test would be most appropriate? Provide critical value and calculated test statistic, and then state your conclusion.

Odomos	Deltamethrin
13.05	4.24
0.26	9.06
6.97	8.44
5.69	15.35
7.23	6.12
5.28	9.54
7.1	12.16
5.88	5.95
7.18
7.36
3.61
5.19

Answer 1

since the normality assumption is not satisfied we can't use 2 sample t test. So we use it's non parametric alternative Mann Whitney U test.