Exercise

Adding an offset

The area surveyed during each sampling event was not consistent. Therefore, you expect that instances where more area was surveyed may result in a bias in the number of observations of feeding events. To account for unequal sampling effort, you will apply an offset to the model, using the natural log of the recorded value of area.

Note that the dragonflies data set has been preloaded.

Instructions

100 XP

Create a column containing the natural log of the area sampled.
Add these values as an offset to the model.