... june 09:
Following is an example of a suitable set up.
Take two groups of tomato plants that are the same age type and state of health. One group is affected with
beet caterpillars, the other is unaffected.
Both groups are kept in the same environment (for example, the same temperature and water availability).
Wasps are released and their activity is observed.
Large numbers of plants are used or the experiment is repeated many times.
No a large sample is a different mark to a repeated measures experiment.
^^same mark
why would u repeat it under diferent conditions?? that will get u results all over the place when we are after clarity??
Oh okay it probably will be the same mark then!
However, they're not the same thing.
You would repeat it under different conditions because you want to ensure that no extraneous variables which were present at that time influenced results.
Like, temperature in a cold winter month leading to a faster metabolism, in this case.
Or something along those lines.
Large sample size is to rule out most extraneous variables to do with the mice. I would say repetition is tackling more environmental extraneous variables.