Documents / Report
This is Project Blue Book Special Report No. 14, "Analysis of Reports of Unidentified Aerial Objects," Project No. 10073, dated 5 May 1955. The study reduced about 4,000 sighting reports received by the U.S. Air Force between June 1947 and December 1952 to IBM punched cards and analyzed them statistically, including chi square tests comparing knowns with unknowns. It concludes that the reports very probably do not represent technological developments beyond present scientific knowledge, and it notes that no case produced physical evidence.
“Roe”1 page
,f /J/t 7~//)/v 0f r?/1 /&///wje Percent Certain /00 0.0 00 00 ao 0.O 0.0 600 Doubtful /0.0 O-t? %>•(? 0.0 #0 00 00 0.0 /tx>. Evaluation O-Balloon l-Astronrmical 2-Aircraft 3-Li(M Plienoa. «• Birds 5-Clouds, Oust, etc G-lnuffic Info. 7-Psyclnloiical 8-Uf*no«n 9-Other Total M/)* Total SI f 2! 5- 0 0 / /7 /07 Percent Certain / / ^ ¥•7 /y)/2e^ Number Certain 3 a i 0 0 z / 0.0 00 0.0 06L .?/? Doubtful ??• 3 / / • / 6.4, g.i. 0.0 0.0 0-0 0.0 4/. i Total ?3.1 n0 00 /£•? 00 /00- /l/pssM/gea. Number Certain / 0 • r / / Doubtful s~ 3> _f / 0 0 0 0 0 /O Total T ,f 0 0 .5- ^, 2/f Percent Certain ?•£ 0-0 M. 0.0 0.0 4r g 00 00 $2.4 Doubtful /tf.J ,43 00 Oo 00 O.0 00 47 Numbcf Certain 2. 4/ / 0 / 20 Doubtful / ^ 0 0 0 0 Total j ? / 0 0 2. / $ 24 Per Cent Certain X.3 ti-7 4Z 100 00 4.2. 33.3 4-Z $2.3 Doubtful 4/2. 4.2 ?2 00 0.0 0.0 (7-0 0.0 00 /6 7 Total /2-6 20.9 42- 0.0 00 $.2 42 33.2 4.2. /P0 186
Report, cited by the archive. 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.