STAT 110 Lecture Notes - Lecture 5: Dependent And Independent Variables
14 Sep 2016
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The individuals in an experiment are called subjects (or experimental units) A treatment is a specific experimental condition applied to the subjects. A response variable is a variable that measures an outcome or result of a study. An explanatory variable is a variable that we think explains or causes changes in the response variable. Statistically significant: meaning that the difference between the treatment groups was so large that it is likely not explained by random chance. Randomization- the use of impersonal chance to assign subjects to treatment groups. Comparative experiment- an experiment that compares two or more treatment groups. Lurking variable- a variable that has an important effect on the relationship between the response variable and treatment but is not one of the explanatory variable studied. Confounded- when their effects on a response variable can not be distinguished from each other.
