LETTER TO THE EDITOR: SAMPLE SIZES CALCULATIONS FOR ORDERED CATEGORICAL DATA by J. Whitehead,Statistics in Medicine, 12, 2257-2272 (1993).

1996 ◽  
Vol 15 (10) ◽  
pp. 1065-1066 ◽  
Author(s):  
STEVEN A. JULIOUS ◽  
MICHAEL J. CAMPBELL
2003 ◽  
Vol 12 (1) ◽  
pp. 73-84 ◽  
Author(s):  
N Rabbee ◽  
B A Coull ◽  
C Mehta ◽  
N Patel ◽  
P Senchaudhuri

Author(s):  
Shein-Chung Chow ◽  
Siu-Keung Tse ◽  
Chunyan Yang

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