anti-aircraft fire is random so doesn't specifically target any section of the plane. Therefore, the planes that return to base are a biased sample of the plane

anti-aircraft fire is random so doesn't specifically target any section of the plane. Therefore, the planes that return to base are a biased sample of the planes that took on damage. See: http://www4.ncsu.edu/~swu6/documents/A_Reprint_Plane_Vulnerability.pdf http://www4.ncsu.edu/~swu6/documents/A_Reprint_Plane_Vulnera...