Results
Paired Samples T-Test
Data from Matthews et al. (2007).
| Measure 1 | Measure 2 | W | z | df | p | Rank-Biserial Correlation | SE Rank-Biserial Correlation | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| control | - | signalled | 13.500 | -2.236 | 0.024 | -0.703 | 0.305 | ||||||||||
| Note. Wilcoxon signed-rank test. | |||||||||||||||||
The above table tells you that the significance of the test was .024 and suggests that we reject the null hypothesis.
Descriptives
| N | Mean | SD | SE | Coefficient of variation | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| control | 14 | 0.786 | 0.975 | 0.261 | 1.241 | ||||||
| signalled | 14 | 2.000 | 1.177 | 0.314 | 0.588 | ||||||
Raincloud Plots
The raincloud plots give some insight into the observed differences. We can see that most of the differences are negative, meaning that signalled was greater than control for the majority of cases. In terms related to the study, this means that the number of eggs fertilized by the male in his signalled chamber was greater than for the male in his control chamber, indicating an adaptive benefit to learning that a chamber signalled reproductive opportunity. The one tied rank tells us that there was one female who produced an equal number of fertilized eggs for both males.
control - signalled
Raincloud Difference Plots
control - signalled
