PSY 2810 Lecture Notes - Lecture 4: Empirical Measure, Operational Definition, Empiricism
27 Sep 2016
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Document Summary
Discrete variables the possible values for the categories area all- independent. It is impossible to have a value between the two categories: example apple and orange, nominal and ordinal are always discrete, no intermediate answers. Expected values (ev) the predicted value that a variable will take. Calculated as the sum of each value multiplied by its probability of occurrence. Ev for discrete variables is not the most likely out come from a single event. Continuous variable values are not restricted (in theory). These are not a infinite number of potential values for these variables: temperature, height, no measure is truly continuous. Some may seem continuous when they are actually discrete. Expected value (ev) of a continuous variable is the same as the mean of the continuous variable (aka sum: actual expected value can change depending on precision of measurement. Conceptual they exist only as a theoretical construct with out a way to directly measure them.
