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.
“Jet Propulsion Laboratory”1 page
Enltation r> Balloon 1-Aslnrmical 2-Aiictall J-Li(M Pnenon. ••Bute S-Clouds, Dust. etc. 6-htiufltc tnfo. 7-Psydalopal «-Unkao«n Total Certain £ C a i 0 i iQ Numbet Doubtlul c 3 0 c 0 P n 3 | T o U [ _ 0 1 0 c I • 0 [ n Pet Coil Ctrl»n OC tut ao o.o O.o J-l o.o l i 11 Doubtful 0.0 ?ll 1-0 0-0 CO 0.0 Total O.Q L-l C l i t o.t at a.o ao\ 77 CD CO 13.1 7-7 7-7 '09- Numbet >itamj ~ r jz^ _t 0 o 1 0 1 2 10 Doubtful 0 3 0 i 0 1 2 / 3 Pet Cent Certain ISM UA 111 -M. 7-7 -AS. \T1 IUL Doubtlul 0.0 QJ £.0 0.0 0,0 0.O 7V Total AT* 18.h HA 0J> 0.0 6.0 1-7 P.D 7.7 !*.+ /ft Number ;ntain 5 0 0 P C _ J 2 u -JL Doubtlul / 0 0 0 0 0 0 1 (. Total C H- 1 Q 0 0 k Q .O 0.0 Q H 21 h to i l l 3-1 w. Nuntel Certain / / 2 0 ' 0 0 -3 L (, 0 I± Doubtlul 0 Q 0 0 0 0 o 0 o 0 Tobl / / 1 0 0 0 •i / (, 0 n L. Per Cent Cabin 77 77 III JJL 0.0 2Ut JJL Ift.Q Doubtful 0.0 0-0 0-0 0.0 Q.O o.o op 0.0 00 0.0 Total 7.1 1.1 IH- 3 0-6 0-t> OJ> Qf.¥ 7 / o.o \od- Evaluation 0-Balloon l-Astronomical 2-Airctaft 3 L i | M Ptienon. ••Bints S-Clouds, Dust, etc. frlnsutlic Into. 7-PsycKok>|ical t-Unkwioi W i n e r Total Number Certain / JL •6 o 0 •3 0 1 0 5 Doubtful C: 1 9 (1 9 $ r 0 i 2 Total 7 0 0 0 0 2 0 1 1 7 PerCent Certain jit 3 0 0 oo o.o JJL -JA Wit 0.0 ll.t Doubtful o.o / y 3 q.s 00 O-o 0-0 0-0 2g.C ToUl /«3 29.C 0-t O.fi 00 0.0 T^k -£& / * 7 li'3 HI, ( Z v AS ET Number CerUin 0 _J2 o JL o 0 0 A 0 6. Doubtful 0 Q 0 0 o 0 p (? 0 Q 0 Total ¥ JL. 0 0 o o 0 0 3L 0, & Percent Certain CCl 0.0 0.0 0.6 OC u 0.0 JLl /tt.o Doubtful QP 0-0 0.O 0.0 AO 0.0 o.o 0.0 0.0 Q.Q O.t Total o.O O.O hi fi.0 00 0.0 it) VI 40 0. Nuitet :ertain / JL JL0 . 0 a Q UL Doubtful 0 9 1 0 0 0 0 o 0 9 i Total 1 / 5 0 0 0 H 0 tQ 16 PerCent Certain 6-7 m9.0 9.0 0.0 2C.7 oJ 26.7 CO fi.3 Doubtful 0.1 CO £7 o-t 4.1 ao > o.o PC. 9-9 Cl Total Jj. '.-) Hi 0.0 9-9 Q.Q OJ 1*1 0.0 /OO. Number Certain 1 1 Q o O 2 0 5" / HA Doubtful Q li I 0 i a. 0 0 0 /2_ 0 s ToUl 1 s 0 Q Q 0 5 1 *(? PetCoit Certain 10.0 S.O 211 9-0 •! 0-0 (1.0 O.0 o.o 6,0 i-o Total in JLL 33. 'i OO (\.o O.O Q-0 33.3 9-1 100. Number Certain 2 if I 0 n ) 1 i t l Doubtful "3 00 o D 0 o P Total i 1 0 o o 1 1 I Percent Certain tit 23.5 JJL o.o AC &0 JT.f 5.9 HB S.9 70. i Doubtful in IIS! o.o 0.0 114 o.o 0,0 0.0 P.Q m Total It* U3 JJL 0.0 0-0 st //» no. 127
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.