test one - PSYC 209 Univariate Statistics Constants...

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PSYC 209: Univariate Statistics 25/09/2006 16:18:00 Constants Definition: any measurement that does not change Example: pi, distance A variable can be a constant in a given context  Variables Definition: any measurement that can take on different values depending  on the situation Levels: possible scores a variable can take one o Categorical: sex, religion o Continuous: height Scale of measurement of a variable o Information you get from levels Nominal: just a name, ex: religion Ordinal: have some form of order (implied), ex: shirt size  (S,M,L) Interval: implied order, two adjacent levels are same interval  or distance apart, ex: temperature in F. No true zero that  shows absence (zero degrees does NOT mean no  temperature) Ratio: even proportions, true zero, ex: money (a nickel is five  times more than a penny) Independent variables (IV)   (effect) Dependant variables (DV) Sample versus population o Population: all possible scores of a group of people or things,  theoretical, measured in parameters to summarize (parameters  often immeasurable) o Sample: subset of population, scores you measure to represent the  population, measured in statistics Generalization: drawing conclusions about the population 
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This test prep was uploaded on 02/25/2008 for the course PSYC 209 taught by Professor Corey during the Fall '06 term at Tulane.

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test one - PSYC 209 Univariate Statistics Constants...

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