Biology 2244A/B Lecture Notes - Lecture 2: Dependent And Independent Variables, Random Assignment, Blind Experiment
1 Jan 2017
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We can only claim (cid:494)association(cid:495) other potential variables in play. Just because there is a relationship between 2 things, doesn(cid:495)t mean that one thing. Amount of housework and longevity: social class: eat better, exercise more linked to better diet = more time cleaning caused the other the house. Principles of experimental design: socioeconomic status/diet, variables that go together and influence the thing were interested in (longevity) Replication repetition of a treatment on different units within a study (different from. Randomization random assignment of units to treatments, or, the order of treatment. More than 1 person experiencing 4 inch heels. 1 response and observe the variability experienced: treatment groups are homogeneous, on average. Randomization process, on average, you get groups that are the same: not the same as random sampling (what you do to get your individuals, what you do when you have your individuals, example:
