K. Pearson llB 
Table III gives the age and intelligence grade for schoolboys; Table IV the 
same characters for girls. 
TABLE III. 
Age and rntelligence. Boys. 
Age 
Quick 
Intelligent 
Intelligent 
Slow 
Intelligent 
Slow 
Slow Dull 
Very Dull 
Totals 
•4 
1 
2 
1 
2 

— 
6 
5 
2 
5 
5 
4 
1 
17 
6 
6 
12 
15 
4 
3 
40 
7 
19 
25 
25 
4 
6 
4 
83 
8 
20 
60 
39 
30 
7 
156 
9 
24 
57 
GO 
34-5 
7-5 
6 
189 
10 
33 
76'5 
72-5 
35 
21 
2 
240 
11 
35 
96-5 
105 
42-5 
11 
5 
295 
12 
39 
110 
120-5 
51 
12-5 
0 
336 
13 
27 
107-5 
108-5 
57-5 
25-5 
11 
337 
n 
29 
84 
70 
39-5 
16 
3-5 
242 
15 
16 
66-5 
68-5 
19 
16 
2 
188 
16 
14 
39 
43 
28 
9 
2 
135 
17 
9 
24 
24 
8 
4 
3 
72 
18 
3 
16-5 
11-5 
8 
39 
19 
2-5 
5-5 
2 
2 
12 
20 
1 
1 
2 
Totals 
279-5 
788 
771-5 
369 
139-5 
41-5 
2389 
TABLE IV. 
Age and Intelligence. Girls. 
Age 
Quick 
Intelligent 
Intelligent 
Slow 
Intelligent 
Slow 
Slow Dull 
Very Dull 
Totals 
3 
1 
1 
4 
1 
5 
6 
5 
4 
5 
9 
1 
19 
6 
7 
13 
14 
4 
3 
41 
7 
16 
27 
20 
6 
6 
2 
77 
8 
20 
40 
33 
15 
4 
2 
114 
9 
20 
74 
61 
22 
7 
2 
186 
10 
27 
91 
69 
23 
9 
3 
222 
11 
38 
106-5 
90-5 
23 
10 
4 
272 
12 
44 
106-5 
84-5 
36 
18 
5 
294 
13 
38 
93 
80 
40 
10 
3 
264 
n 
32-5 
64 
60 
29-5 
13 
4 
203 
15 
22 
64-5 
75 
33-5 
13 
7 
215 
16 
19 
48 
54 
27 
7 
4 
1.59 
17 
18-5 
34-5 
21 
8 
8 
2 
92 
18 
14 
20-5 
14-5 
10 
5 
1 
65 
19 
2 
3 
4 
3 
12 
20 
1 
1 
3 
2 
7 
Totals 
324 
797-5 
692-5 
i 
283 
113 
39 
2249 
Biometrika v 
15 
