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.
“R.G.”3 pages
*H^>?H-.'i*'*vu-'.-.-. : - - 0 . - Evaluation 0-Balloon l-Astronomical Z-Aircrift 3-LigM Phenom. 4-Birds 5-Clouds, Dust, etc 6-lnsuffic Into. 7-Psycho logical 9-Unknown 9-Other Total tMlJT Certain 5 j? 0 0 '/I / 37 Number Doubtful ?r 0 tO •0 0 0 2i, j*9 £ Total / ? /? 1 0 i P rtt Cent Doubtful L./ 0.0 /•2, 0 0 0.0 0-0 Total « K /2 2 /•I 49 00 13 '0.0 7.'2 r- / 'r~(A Number Certain / 0 c? / 0 * 2.2, Doubtful 2, 0 0 0 /J Total 4/ •'0 _j2_ / f /($ $ VT0/I/ /J Per Cent Certain /I. 9 -2JL J2J2. 0.0 0.0 221 2J- W ' Doubtful 56 /J.? '67 00 (20 3.0 0 0 0.0 2t Total //.Z 27S ?•$ $c? z s 0t" Z1Z, 'HO. Number Certain ,'£> 22 1 /» 2,, . / ^/ /£•? /• £ •'/• C ,'0.0 2-7 3 £ • ^ "ft Doubtful ?• )rf 0F r/f£ /2 2- 0 H Total 25 Zi u f z I? (7 ft 3 /2$ Percent Certain &£\ /0.4 / /(. tfrf£./tn//>£ 0f . Number Certain / / 2/ ; 0 0 tx Doubtful ^ _ J ' / 0 0 0 0 ^ ToUl 3 4 s z 0 0 z / z s /9 'r// &/s7~. Certain /'fii/£5T~ /e&/Z/0AJ y /#et«£S7 Percent Doubtful /0.5 /s:g .0.0 00 0.0 0.0 0.0 0.0 2,/. / a.t, Total ?./•/ J2JZ. 0.0 &.3 5:3 /0p. Number Certain Doubtful Total Percent Certain Doubtful Total Number Certain Doubtfu Total Per Cent Certain Doubtful iTotal^ L. 253 and 254
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.