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.
“Otis”1 page
Enliatm 0- Balloon l-Asfcamical 2-Aircnfl 3-Lifjht Phenoa S 1 f Doubtfu J. /f 3 O 0 0 0 0 0 1 7-2. ToUl 5" j / 1 0 0 o r 70 Per Cent Certain ±1 1A 0.0 at 0.0 li.t 1.1 111 7.1 08.6 Doubtful 2.1 Mf t ? 0.0 O.O to I.H 1I.H Total 12 H i /2-1 at 06 At / / • * ni #.S IOC- Nunbcr _ j :«tam £ II r 0 0 3 0 6 7 If Doubtful - £) /2 J- O P O O 0 0 /•? Total i /e O O 3 O / 7 5-5- Percent Cerbin /Of 20.0 91 0.0 O.C r.s lOf 12 1 tf.i Doubtful 0.0 V-8 11 M 0-0 Q.O 0-C Q.O 0.D 04 30.? Total 10.1 11-9 O.o O.C ss IP-i U-1 tin ltd. Number >rtam 1 ( 0 3 0 /o 0 73 / s~s Doubtful X. /t> 7 0 / a O 0 6 j-f Total IP 7-2. 'S 0 3 / /0 0 13 ? Per Cent CerUin u ft'5 u U ao 170 O.o f f / 2 H I Doubtful 11 /zo 0.0 (-1 0.0 o.p 0.0> t.c S}.J Total 12.0 US If-D 0>.D JC 12 12.0 p.o ff-7 /a? mi. Number Certain 7 /f AO I 3 *l % 31 X m Doubtful J. 7 ,0 I 0 0 0 0 /3 ToUl 1 JX ?7 I V 0 2-1 ?• 3V 2- 1X7 PetCoit Certain \_r.f Is.o li.l OB 74 £1.0 US IC 30.7 I 6 9fS Doubttal 1 i •2-U ss 0-0 as04 0.0 0.0 00 0.0 It. 2 Total 11 17-V •312 9-2 3-2 Oo /(.S 30.1 /•&, IK. Evaluation O-Balloon l-Astnnoraical 2-Airctjft 3-Lifhl Pnenoa. 4-Birds 5-Clouds, Dust, etc frliauflic Into. 7-Psychotofial S-Unknoan 9-Otfief T o t - A/A / Number Certain '7 1Z. 3 0 It I f /PI Doubtfu £ /J 2. • z 6 17 2- ?-? Total ?O 2% 30 5- Z 2. /6 Q I f f /*•? Percent Certain /12 /•J.I n.2 •?-3 CO I.C S.0 "+.0 H-1 183 Doubttu ^•'3 1-7 Iffl IC _l_c_ •t.o 0,0 0-0 0.0 IC in Total 15.5 71.9 23-3 7 7 1-6 / ? • • t?,e /f.O 4 3 /so. Number CerUin JS 1 0 0 J.X. / 7 /u-7 Doubtful J- IJ2. O $ 0 P / 3& Total 33 31 40 2. 0 0 6 33 S /T3 PerCent Certain 15.3 M /f-3 o.r fa 0.0 11.6 3.3 i8.0\ 18 go.3 Doubtful 7-7 13 CC OS 00 0.0 0.0 0.0 OS ft-7 Total /t.o 21.3 111 l.o 0.0 0-0 IJ.O 3.3 18.0 110: Number ;ertain 7* fv 13 3 I g /J2/ 7-U #70 Doubtful 3? 72 3 1 O f 0 1 /6f ToUl l/f f£ /£6 17 ( • 2 7* a 63% Pet Cent Certain ILL 11 lt-1 1-0 0.5 0-2 114 A3 no 3.? 73.7 Doubtful Cf CO li-1 04 0.5 0/2 0.0 A3 0.0 0.1 2&3 Total If.O 'S.I 7C.0 24 l.o Ot II. C ?•£ no t.o 100, Number Certain 3? A? iff 6 • 19 0 UP ?f II Z7S Doubtfu 6 / O 1 P s- 122. Total 7S Z? /?• O f // 79 /£ H-07 Per Cent CerUin •7.1 104 II •* 1-5 O.o 0.0 1.2 ?-S 11-f 7.7 C1.6. Doubtful U / / • / 9.1 IS p.o o-2 0.0 0-7 1.7 32.9\ Total i l l 10.1 3J 0.0 0-7 1-3 7-7 3.9 /St. Evaluation 0-BaHoon 1-Astronomical 2-AircraH 3-lijtit Phenom. 4-Birds S-Clouds, Dust, etc 6-lnujfiic. hfo. /-Psychological S-UnknoMi ' 9-Othee Total Number Certain b / % • , ) / / 0 I t 3 f /I / Doubtfu /Z 7 27 z 2. / 0 r rs Total ff qP .3 3 ff 3 10 166 Per Cent Certain 34 '6.? 12 t.b I t , 0.0 JLJL 19 Q5.3 4.1 Doubtfu 11 5 .if U.3 11 1-7 04 CD 0.0 0.0 12 33-1 ToUl 10.8 U l Ml 1.8 1-8 O.C H* 19 25.3 CO 100. Number Certain 0 1 I) /o1 30 7$ Doubtful /Z IK 2 1 fi 0 0 I 47 Total 20 33 20 7 /j. / /O 1 yo 3 Pet Cent Certain Cf n.9 7-2 0.8 •14 0.0 M no u Doubtful 14 / if ^ 8.2 I.C u o.p 0.0 0.0 0.? nt Total ICO 2&M ICO 2f 3.2 O.g 8.0 o.S 2V.0 2-1 ion. Number Certain r 2-/ 3 D 6 7 1 j_l if. 73 Doubtful 1 f1 O 2. 0 0 0 0 33 ToUl 7V- 16 17 0 2, 7 ?-i /O6 Percent Certain ±1 III It-H 2-Z 0.0 0.6 • C.C. Q-1 /f.9 -5.2 C9.1 Doubtful F.S /i 1 S.I 0-1 0.0 I f 0.0 40 O.P •3// Total n-7 3 ft. I 3.1 to 1.1 O.f / 0 Q_ 32- ToUl / / ?^ / O Cf Z fof PerCent Certain 5.1 J1L Q-l 1.0 0.0 0.0 g.C -LL 11.0 14 67.5 Doubtful 10-S Q.O 0.0 0.0 0.0 0.0 Ac 30.5 Total /O.S -57.3 m1.0 (7.0 O.O 8.C 11 1/..0 7.C /SO. 123 .
Report, cited by the archive. The PDF is mirrored here; the original link is under it. 309 pages are in the text index: search them above, or from the library's search.