Documents / Analysis
Special Report No. 14 was issued by the U.S. Air Force's Air Technical Intelligence Center on 5 May 1955. It is a statistical study of about 4,000 reports of unidentified aerial objects from June 1947 to December 1952. The reports were reduced to IBM punched cards and analyzed with methods including chi square tests. The report concludes that the reports it examined are very unlikely to represent technology beyond present scientific knowledge, and it notes that no case produced valid physical evidence.
ro 100 90 60 70 <_ 60 c 0) U 50 No. of object sightings 2199 79 43 186 169 121 Q. 40 30 20 10 0 1501 " f t i - - Excellent Good Doubtful Poor V \ \ \ \ \ 1 ' • 1 / 1 / 1 1 1 I 1 1 1 1 1 1 1 1 1 1 1 1 1 t \ \ ( . \ V \ \ 4 • * \ ' \ \ \ \ \ \ \ ) — - 100 90 80 70 60 50 40 30 2 0 H 10 All years 1947 1948 1949 1950 951 1952 FIGURE 9 DISTRIBUTION OF OBJECT SljGHTINGS AMONG THE FOUR SIGHTING RELIABILITY GROUPS FOR ALL YEARS AND EACH YEAR A-74 87
Analysis, from the classic collection. The PDF is mirrored here; the original link is above. 309 pages are in the text index: search them above, or from the library's search.