EAGLES

Data:

   y  n P A V
1 17 24 L A L
2 29 29 L A S
3 17 27 L I L
4 20 20 L I S
5  1 12 S A L
6 15 16 S A S
7  0 28 S I L
8  1  4 S I S

Description:

Ecologists collected during a field study on the foraging behaviour of wintering Bald Eagles in Washington State, USA data concerning 160 attempts by one (pirating) Bald Eagle to steal a chum salmon from another (feeding) Bald Eagle.

Format:

- y
Number of successful attempts.

- n
Total number of attempts.

- P
Size of pirating eagle (L = large, S = small).

- A
Age of pirating eagle (I = immature, A = adult).

- V
Size of victim eagle (L = large, S = small).

Task:

Report on factors that explain the success of the pirating attempt, and give a prediction formula for the probability of success.