58 
Table 9 
Proportional reasoning: 
Solution probabilities at age 15 
Urban sample 
Variable 0 
3 
5 6 7 8 9 10 11 N 
4 
2 
1 
RATXSC5 0,9% 5,6% 7,5% 24,3% 5,6% 3,7 % 1,9% 0,9% 3,7% 7,5% 24,3% 14,0% 107 
Table 10 
Proportional reasoning: 
Solution probabilities at age 17 
by teacher rating 
Urban sample 
Teacher rating 
high 
Variable 0 
4 
3 
2 
5 6 7 
8 9 10 11N 
1 
RATXSCS 19% 11,1% 
11,1% 33,3% 7,4% 5,6 % 0% 1,9% 3,7% 3,7 % 20,4% 0% 
53 
Teacher rating 
low 
Variable 0 
2 
345 6 7 8 9 10 11 N 
1 
 
RAIXSCS 0% 0% 
3,8% 15,1% 3,8% 1,9% 3,8 % 0% 3,8% 11,3% 28,3% 28,3% 54 
Table 11 
Proportional reasoning: 
Solution probabilities at age 15 
by gender 
Urban sample 
Gender 
male 
— 
Variable 1 
3 
5 
2 
4 
6 7 
10 11 N 
8 9 
RATXSCS 7,0% 
3,5% 22,8% 5,3 % 5,3 % 1,8 % 1,8 % 3,5 % 7,0% 24,6% 17,5% 57 
Gender 
female 
Variable 0 
3 
5 
4 
6 
8 9 10 11 N 
2 
L 
RATXSCS 
2,0% 4,0% 12,0% 26,0% 6,0% 2,0% 2,0% 4,0% 8,0% 24,0% 10,0% 50 
Table 12 a 
Proportional reasoning: 
Solution probabilities at age 15 
by social class in two categories: low (SES 1-3), high (SES 4-6) 
Urban sample 
SES 
low 
Variable 1 
3 
5 
6 1 8 2 10 11 
2 
4 
— 
 
RAIXSCS 8,9% 12,5% 16,1% 7,1% 5,4% 3,6% 1,8 % 1,8 % 10,7% 21,4% 8,9% 56 
SES 
high 
10 11 N 
Variable 0 1 2 3 4 
8 9 
50 
RATXSC5 0,0% 2,0% 2,0% 33,3% 3,9% 2,0% 0,0% 5,9% 3,9% 27,5% 19,6% 51 
Table 12 b