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Statistical Innovations at Cytel.com. Specializing in clinical trial design tools, services, and exact statistics applications
Cytel Inc.  early stopping  exact stats  LogXact  sequential trials  StatXact PROCs 
www.cytel.com - 2009-02-05
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Statistics Tutorials for SAS, SPSS, WINKS and Excel -- for research in Medicine, Clinical Trials, Psychology, Marketing & Data Analysis.
friedman's test  weighted kappa 
www.stattutorials.com - 2009-02-10
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