burnt unburnt -5 O e 0 5 Relative abundance 10 O 15 20 25
Researchers measured the occurrence of reptiles using pitfall trapping across mallee Eucalyptus habitats that had been either recently burnt or unburnt. They were interested in comparing the abundance Southern knob-tail geckos (Nephrurus stellatus) between these two habitats and so calculated the relative abundance of this species found at each trap. Based on the output below, what would be the most correct conclusion to draw about these data?
|
|
Mean |
n |
Std deviation |
Std error of mean |
|
burnt sites |
8.08 |
30 |
6.12 |
0.94 |
|
unburnt sites |
2.73 |
30 |
3.33 |
0.51 |
Variance ratio test = 3.37 : 1
options:
|
|
The data are skewed and a log transformation (after adding 10 too all values to remove negative and zero values) should be attempted before performing a parametric test |
|
|
The data are skewed, however a transformation would not be appropriate for these data |
|
|
The data are symmetrical, a parametric test would be suitable for these data |
|
|
The data are skewed and an arcsine transformation should be attempted before performing a parametric test |
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