ENV330H5 Lecture Notes - Lecture 8: Dependent And Independent Variables, Soil Ph
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It might not be an experiment if . the conditions aren"t controlled it isn"t replicated (e. g. case studies; only one reference site) it isn"t randomized (e. g. organisms exposed to a condition were not randomly assigned) Are they randomized? interpreting results from applying experimental analysis to unplanned experiments can be tricky! 1. carefully controlled conditions (ideally, the only thing that differs among the experimental units is the condition of interest) 2. experimental controls: experimental units with known conditions that are compared to treated units. 3. randomization: experimental units are assigned to treatments randomly to avoid bias. 4. replication: multiple experimental units are assigned to treatments to be representative of the population of interest. 5. ifavariable is known to affect the outcome, treatment is applied to blocks based on that characteristic. Need to look at main effects and interaction effects. Seeds are collected from different populations across a geographic gradient and grown in a common garden to see if there are specific traits that are local adaptations.
