# Simulated data on 100 chicks. "x" is the amount
# of resource available to that chick, and "y" is
# 1 if chick survived, 0 if died.
             x y
1    0.3170199 0
2    7.6830727 1
3    4.6010501 1
4   12.3784203 1
5    1.7440160 1
6    3.4501499 1
7    1.4514809 1
8    2.7792823 1
9    0.6417237 0
10   0.5278465 0
11   2.5691120 1
12   0.4893231 1
13   0.8562173 1
14   0.7214506 0
15   0.3790581 0
16   1.7971986 0
17   0.4802156 0
18   1.1467924 0
19   1.3519385 1
20   2.4897569 1
21   0.3533588 0
22   0.6047656 0
23   4.2601360 1
24   0.2618499 0
25   0.4381943 0
26   0.5880989 0
27   0.2468855 0
28   0.5472060 0
29   4.8215483 1
30   0.3232751 0
31   1.5464626 1
32   0.5287089 0
33   1.8907594 1
34   0.9802482 1
35   0.5810685 1
36   3.7351312 1
37   0.4681788 1
38   5.6738645 1
39   0.5249298 0
40   1.4922459 1
41   0.5643452 0
42   1.3426985 1
43   0.8810866 1
44   0.6995418 0
45   0.3400682 0
46   0.1633125 1
47   0.5033122 0
48   0.6628652 1
49   1.0879848 1
50   0.3732035 0
51   2.1966720 0
52   0.9368323 1
53   7.0332403 1
54   2.8878523 1
55   0.3638214 0
56   2.6686478 1
57   1.2185161 1
58   0.5757211 0
59   0.2777743 0
60   0.2197568 0
61   4.0335881 1
62   2.4243804 1
63   1.6544084 1
64   0.2969720 0
65   4.4217649 1
66   0.6474396 0
67   4.0097234 1
68   1.9873456 1
69   0.5504530 0
70   2.2592137 1
71   0.1484378 0
72   2.4657947 1
73   1.0919740 0
74   3.7525927 1
75   2.4093272 1
76   1.2392411 1
77   0.2023679 0
78   0.5375848 0
79   0.7467056 0
80   1.2785453 1
81   0.7723318 0
82   1.3794988 1
83   0.1240894 0
84   0.1998796 0
85   2.3065795 1
86   0.1738017 0
87   0.4784893 0
88   1.6135937 1
89   2.5869917 1
90   0.5532158 0
91   0.4615924 0
92   0.9728204 0
93   0.8729812 1
94  12.8966010 1
95   0.3994870 1
96   1.7238097 1
97   1.5032544 1
98   0.9490136 0
99   1.3556925 1
100  5.2051461 1