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Unformatted text preview: CHI-SQUAREfor a particular number of degrees of freedom TEST STATISTIC NON-PARAMETRIC TEST CONCEPTS Used when the sample data is either Non-normal (from goodness of fit test) Sample is too small to determine normality Rank sum tests Based on the rank order of sorted data sample rather than using the mean and standard deviation Equivalent sets of data with have similar ranks U Test& H Test& PERFORM CALCULATIONS Calculate rank sums W1 is the sum of the ranks of data from set 1 W2 is the sum of the ranks of data from set 2 Calculate U s U1=W1-n1(n1+1)/2 Sheet1 Page 2 U2=W2-n2(n2+1)/2 U1=min (U1,U2) Next& NEXT Calculate the mean of the ranks u = n1*n2/2 Calculate the variance of the ranks Sigma1 squared = n1*n2*(n1+n2+1)/12 Calculate the test statistic Z Z = (U1-u) / sigma1 H-TEST STATISTIC...
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This note was uploaded on 11/21/2010 for the course INDE 2333 taught by Professor Staff during the Fall '08 term at University of Houston.
- Fall '08