GEO 446LEC Lecture Notes - Lecture 10: Stratified Sampling, Design Of Experiments, Statistical Unit
15 Mar 2019
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Manipulative experiments: a hypothesis is tested by altering a factor hypothesized to be the cause of a phenomenon. Natural experiment: an approach to hypothesis testing that relies on natural variation in the environment. Treatment: the factor that we want to manipulate. Control: a treatment that includes all aspects of an experiment except the factor of interest. Replication: being able to produce a similar outcome multiple times. Randomization: an aspect of experiment design in which every experimental unit has an equal chance of being assigned to a particular manipulation. Microcosm: a simplified ecological system that attempts to replicate the essential features of an ecological system in a laboratory or field setting. Determine overall level of occupancy for a species in particular region. Compare the level of occupancy in two different habitat types within that region. Interest lies in making inference from a sample to a population. Others should understand what you have done and be able to replicate.
