SELECTING A HYPOTHESIS TEST: a decision chart
Based on Robert S. Witte (1993) Statistics 4th Ed. New York: Harcourt Brace
RETURN
edited 8/19/11
DATA TYPE 
Condition 1 
yes/no 
Condition 2 (if needed) 
yes/no 
Testing Process 

Condition3: Are assumptions violated or original observations ranks? 
yes/no 
Corrections: MannWhitney, etc. as appropriate 
NONNUMERICAL 
Observations crossclassified? 
Yes 
TwoWay Chi^{2} 
Finished 

No 
OneWay Chi^{2} 
Finished 

NUMERICAL 

1 Group 
t for population mean 
Finished 

2 Groups 
Observations paired? 
Yes 
Evaluated for Relationship? 
Yes 
t for pop corr coefficient 
Finished 


No 
t for 2 pop means 
Condition 3 
yes 
Corrections, then Finished 


no 
Finished 


No 
t for 2 population means 
Condition 3 
yes 
Corrections, then Finished 


no 
Finished 

More Groups 
two factor classified? 
Yes 
TwoWay F 
Finished 

No 
OneWay F 
Condition 3 
yes 
Corrections, then Finished 

no 
Finished 