Here we shall briefly consider the prognostic value of age in
reference to the time when failures occur and the amount of failure for
such age. If we were to total all the failures for a given age, as
shown in Table I, what part will that form of the total subjects taken
by these pupils at the time the failures occur? In other words, what
are the percentages formed by the total failures on the possibility of
failing, for the same pupils and the same semesters, considered by age
groups? The summary line of Table I gives the total failures according
to the ages at which they occurred. The number of pupils sharing in
each group of these failures is also known by a separate tabulation.
Then the full number of subjects per pupil is taken as 41/2, since
approximately 50 per cent of the pupils take five or more subjects each
semester and the other 50 per cent take four or less (see p. 61). With
the number of pupils given, and with a schedule of 41/2 subjects per
pupil, we are able to compute the percentages which the failures form
of the total subjects for these failing pupils at the time. These
percentages are given below.
THE PERCENTAGES FORMED BY FAILURES AT EACH AGE ON THE POSSIBILITIES OF
FAILING AT THAT AGE AND TIME, FOR THE SAME PUPILS
Ages 13 14 15 16 17 18 19 20 21
% 36.6 38.0 37.9 40.9 40.8 41.2 41.3 42.0 42.7
[Footnote: These percentages are computed from the data secured in
Table I, as noted above.
Pages:
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73