A 1955 US Air Force statistical study of about 3,200 UFO reports from 1947 to 1952. It sorted cases into knowns, unknowns and insufficient information (unknowns about 21.5% of all sightings, 689 of 3,201, and 19.7% of object sightings, 434 of 2,199), ran a chi-square comparison of knowns against unknowns, and stated that the probability the unknowns were “flying saucers” was “extremely small”. Released in PURSUE Release 03 as CIA-UAP-015.
Connections
Project Blue Book · Robertson Panel · Battelle Memorial Institute