7" THEORY OF STATISTICS. 
TasLe IL —Showing the Numbers of Married Women, in certain Quaker 
Families, Dying at Different Ages. (Cited from Proc. Loy. Soc., vol. 1xvii. 
(1900), p. 172. On the Correlation between Duration of Life and Number 
of Offspring, by Miss M. Beeton, Karl Pearson, and G. U. Yule.) 
Number of Number of 
; 4 ! 
Age at Death, Poms Dying Age at Death, i Pi Dying 
Yenrd etween onTs etween 
: said Years : said Years 
of Age. of Age. 
175-225 29 62°5— 67°5 73 
225-275 87 67°5- 725 83 
27'5-32°5 99 72'5- 77'5 77 
325-375 109 77'5- 825 78 
37:5-42°5 90 82:5— 875 59 
425-475 87 87:5—- 925 26 
47:5-52°5 64 92:5- 97°5 7 
525-575 54 97°5-102°5 
575-625 69 - 
Total -295 
The distribution is somewhat more irregular than in the last 
case; the commencement is abrupt; a maximum frequency is 
attained in the fourth class (age at death 325 to 37°), and then 
there is a slow fall to the age-class 525-575. After this class 
the frequency rises again and attains a secondary maximum in 
the age-class 67°5-72°5. 
(c) Table III. The numbers of stigmatic rays on a number 
of Shirley poppies were counted. As the range of variation is 
not great, the unit is taken as the class-interval. The frequency- 
distribution is given by the following table. 
TaBLE III. —Showing the Frequencies of Seed Capsules on certain Shirley 
Poppies, with Different Numbers of Stigmatic Rays. (Cited from 
Biometrika, ii. p. 89, 1902.) 
Number of Number of 
Number of Capsules Number of Capsules 
Stigmatic with said Stigmatic with said 
Rays. Number of Rays. Number of 
Stigmatic Rays’ Stigmatic Rays. 
5 3 14 302 
{ 11 15 234 
| B=: 16 128 
106 17 50 
10 | 152 18 19 
i 238 19 } 
Ar 305 20 
13 315 
Total 5 
8 
100 
i 
190F