bwBASIC/NBS2/P139.run

PROGRAM FILE 139: PERMUTATION TEST FOR THE RND FUNCTION.                        
    ANSI STANDARD 8.4                                                           
                                                                                
SECTION 139.1: PERMUTATION TEST FOR THE RND FUNCTION.                           
                                                                                
THIS PROGRAM TESTS TO SEE THAT WITHIN FIXED SIZE GROUPS                         
OF RANDOM NUMBERS, ALL ORDERS OF THE VALUES ARE EQUALLY                         
PROBABLE. CHI-SQUARE IS COMPUTED AND DISPLAYED TO SEE                           
WHETHER THE RESULTS ARE COMPATIBLE WITH THE EXPECTED                            
EXPECTED DISTRIBUTION FOR UNIFORM RANDOM NUMBERS.                               
                                                                                
***** THIS TEST IS INFORMATIVE ONLY *****                                       
                                                                                
                 BEGIN TEST                                                     
                                                                                
                                                                                
ORDER ID       ACTUAL COUNT                                                     
(EXPECTED COUNT = 10 FOR ALL CASES.)                                            
                                                                                
 0              14                                                              
 1              11                                                              
 2              10                                                              
 3              10                                                              
 4              9                                                               
 5              18                                                              
 6              12                                                              
 7              13                                                              
 8              9                                                               
 9              10                                                              
 10             7                                                               
 11             5                                                               
 12             17                                                              
 13             6                                                               
 14             9                                                               
 15             9                                                               
 16             5                                                               
 17             9                                                               
 18             13                                                              
 19             9                                                               
 20             11                                                              
 21             9                                                               
 22             7                                                               
 23             8                                                               
                                                                                
FOR 23 D.F., SHOULD HAVE 13.0905 <= CHI-SQ <= 35.1725                           
(5% TAIL AT EACH END.)                                                          
                                                                                
ACTUAL CHI-SQ =  24.8                                                           
                                                                                
*** INFORMATIVE TEST PASSED ***                                                 
                                                                                
                   END TEST                                                     
                                                                                
END PROGRAM 139