Home > Vocab Stats > T-test
t-Test / Effect Size,
+ Random Input Generator/Doubler + SigDiff Intuition Trainer		  Read R. Lowry on Independent and Correlated T here
This routine compares two columns of data (e.g. test scores of two groups as percentages) and calculates the signficance and effect size
of the means difference. Put your data in the two boxes, indicate data type in Setup, click 'Calculate.' Or put in Random data (Demos)
Setup:
  
Data Entry
Set A
 		Set B



           
< >
Train your in-T-ui-T-ion: hold Trainer button down, guess if diff=sig, release
  DEMOS:        
    		   
Data
Summary »
A
 		B
 		Total/
SD pooled
n  



-X  


-X2  


SS  


mean  


standard dev.  


Meana—Meanb t df
 
   P   1-tailed 
 
 Sig Diff?
Effect size (d)
   ? 
     2-tailed
Effect size (r2)
   ?  

Cumul. random data sets      

Record of random data sets (NEW Dec 2023)