SOAN 2120 Lecture Notes - Lecture 9: Central Limit Theorem, Equivalent Average, Random Assignment
17 Apr 2018
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R o3 o4 x represents an (cid:1688) experimental variable or effect(cid:1689) ( the independent variable) will be the same with chance distribution for example ( weed, mushrooms, alcohol, in the simulating driving tests) Subscripts depict the observation, the exact ordering od the numbering is somewhat unimportant. The experiment has a pre test and a post test tested before treatment and after. Simulating driving tests did not have a pre test ( didn"t let the participants drive the simulated car before they received their substance) don"t have a classical experiment designs can it invalidate the results. Internal validity whether the experiment condition (treatment) actually had an effect within the experiment itself. History when some svelte other than the experimental manipulation affects an outcome, or changes respondents. Maturation subset with the passage of time, people get tired, get hungry and sleepy children subjected to a pre -test post test -design. Testing subjects are observed ( tested) more than once.
