laps. For
example, the distribution of the number of examples on the Courtis
tests, correctly finished in a given time by pupils in the seventh
grades, makes it clear that there are children in the fifth grade who do
better than many in the eighth.

THE DISTRIBUTION OF THE NUMBER OF EXAMPLES CORRECTLY FINISHED
IN THE GIVEN TIME BY PUPILS IN THE SEVERAL GRADES

===================================================================
ADDITION | SUBTRACTION
No. OF |----------------------+ No. OF |------------------------
EXAMPLES| GRADES | EXAMPLES | GRADES
FINISHED| 5 | 6 | 7 | 8 | FINISHED | 5 | 6 | 7 | 8
--------+----+-----+-----+-----+----------+----+-----+-----+-------
0 | 12 | 15 | 5 | 4 | 0 | 6 | 2 | 2 | --
1 | 26 | 23 | 14 | 9 | 1 | 5 | 6 | 2 | 1
2 | 27 | 31 | 8 | 6 | 2 | 7 | 8 | 1 | --
3 | 31 | 27 | 27 | 9 | 3 | 13 | 21 | 3 | 1
4 | 25 | 28 | 19 | 16 | 4 | 21 | 18 | 13 | 2
5 | 16 | 23 | 16 | 15 | 5 | 26 | 30 | 12 | 7
6 | 15 | 22 | 12 | 12 | 6 | 17 | 27 | 15 | 9
7 | 1 | 11 | 8 | 9 | 7 | 15 | 27 | 18 | 9
8 | 3 | 4 | 6 | 11 | 8 | 15 | 20 | 12 | 12
9 | 1 | 2 | 3 | 8 | 9 | 10 | 13 | 9 | 12
10 | -- | -- | -- | 6 | 10 | 8 | 6 | 13 | 11
11 | -- | -- | 1 | -- | 11 | 6 | 2 | 3 | 12
12 | -- | -- | 1 | 2 | 12 | 3 | 1 | 7 | 9
13 | -- | -- | -- | -- | 13 | 2 | 2 | 3 | 5
14 | -- | -- | -- | -- | 14 | 1 | 1 | 3 | 7
15 | -- | -- | -- | 2 | 15 | -- | -- | 2 | 3
16 | -- | -- | -- | 1 | 16 | -- | -- | 1 | 2
17 | -- | -- | -- | -- | 17 | -- | 1 | -- | 1
18 | -- | -- | -- | -- | 18 | -- | -- | -- | 1
19 | -- | -- | -- | -- | 19 | -- | -- | -- | 4
20 | -- | -- | -- | -- | 20 | -- | -- | -- | 2
21 | -- | -- | -- | -- | 21 | -- | -- | -- | 1
22 | -- | -- | -- | -- | 22 | -- | -- | -- | --
--------+----+-----+-----+-----+----------+----+-----+-----+-------
Total | | | | | | | | |
papers |157 | 86 | 119 | 111 | |155 | 185 | 119 | 111
===============================