Gender    Frequency   Percent  
-----------------------------
Boys           655      50.8    
Girls          635      49.2   
                               
IQ        Frequency   Percent  
-----------------------------
60-89          238      18.4  
90-99          298      23.1 
100-109        332      25.7   
110-119        243      18.8 
120-144        179      13.9  
                                     
Teacher's Advice   Frequency   Percent 
--------------------------------------
No further education     11       0.9        
Extended primary educ   161      12.5       
Manual                  509      39.5      
Agricultural             12       0.9     
General                 407      31.6    
Secondary school         18       1.4   
Pre-University          172      13.3    
                                        
Father's Profession  Frequency   Percent 
----------------------------------------
Unskilled labour           14       1.1    
Schooled labour           326      25.3   
Lower white collar         43       3.3 
Shopkeepers               501      38.8  
Middle white collar       243      18.8 
Professional, Managers    163      12.6  

 School  Frequency   Percent   
----------------------------
     1         29       2.2       
     2         33       2.6     
     3         31       2.4     
     4         66       5.1    
     5         39       3.0   
     6         45       3.5     
     7         39       3.0    
     8         31       2.4   
     9         53       4.1  
    10         31       2.4    
    11         30       2.3   
    12         36       2.8   
    13         52       4.0  
    14         29       2.2 
    15         33       2.6    
    16         65       5.0  
    17         57       4.4 
    18         31       2.4    
    19         26       2.0   
    20         27       2.1  
    21         25       1.9  
    22         27       2.1 
    23         26       2.0      
    24         36       2.8     
    25         11       0.9    
    26         27       2.1   
    27         15       1.2  
    28         27       2.1  
    29         20       1.6 
    30         32       2.5   
    31         49       3.8  
    32         57       4.4 
    33         37       2.9  
    34         39       3.0 
    35         35       2.7 
    36         28       2.2 
    37         16       1.2