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Nonparametric Statistics
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Terms in this set (11)
Parametric Statistics
performed on interval/ratio dependent variables
Nonparametric Statistics
Performed on nominal ordinal dependent variables (do not require normality)
One way Chi Square
Involves only only one variable with 2 or more levels
Two way Chi Square
Utilizes two variables with 2 or more levels
Chi Square assumptions
Independence of subjects
Not more than 20% of the expected frequencies is less than 5
Properties of a Chi Square Distribution
Range: 0 to + infinity
Distribution only appears on right side, but it's a non-directional test
as df Increases the distribution is less skewed
as df decreases the critical value decreases
Mean of the disttribution is equal to the df
Variance of the distribution is equal to 2xdf
One Way Chi df
df=c-1
C is the number of categories
Alternative to two way chi if assumptions are not met
Fisher's Exact Test and Yates' Correction for Continuity
Phi and Cramer's V
Can be used to measure an effect size in a two way chi.
Two Way Chi df
df= (r-1)(c-1)
McNemar's Test
The test of margnial homogeneity
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