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
# Evaluation 0- Balloon 1-Astronomical 2-Aircratt 3-litfit Phenom. 4-Birds 5-Clouds, Dust, etc C-lnsuflic Into. 7-P5»t)»lotiol (-UnknoMi ».Ot>ier Total Number Certain 3 £/ /f/ 0 0 J? 2. / / S /I/ Doubtful / 0 /} 0 Total /O/ Z? f / 0 3 2 / * 174 PerCent Certain ££- 32. S /o.9 0/s 0.0 0.0 /0.3 Doubtful /• / 25S ' S.7 00 00 /?-P 2.9 36 2. ToUl •££- //t£ # ( • 01 no /•7 / • / /0f 7,* /oo. /9V7 Number Certain / 0 0 0 0 0 0 0 # Doubtful 0 0 0 0 0 0 0 0 ToUl / i 0 0 -JL 0 0 0 3 Per Cent Certain 66 7 #0 /?0 0.0 0.0 0>0 00 /ana Doubtful 0.0 /2.0 00 00 /?.0 0.0 0c? 00 00 Total S3.3 00 0.C0 0.6 0.0 00 /00. Number Certain 7 0 0 0 0 0 0 / 0 g Doubtful 0 0 £?0 00 #•0 00 a0 S~f.6 Total 00 /0. i. 00 00 /06 /00. Evaluation O-Balloon 1-Astrommicar 2-Aucraft 3-Lijnt Ptienon. 4- Birds 5-Clouds, Oust, e t c (•Insuffic mfo. 7-Psychological UlnknoMi 9-Other Evaluation O-Balloon 1-Astrononical 2-Aircraft 3-Light Phenom. «-Birds 5-Clouds, Dust, etc 6-lnsuffic. Info. 7-Psychological B-Unknown Wither Total /-0 0,0 0-0 0-0 P0 0-0 /00. /£ 0P 0/fJecr 0r#£/e SMrtf&s /III />$ Number Certain 3V 4 7S-6 Doubtful / / 9-* 4/g 0.0 00 00 0.0 00 2/. w Doubtful ?3 &.g / • / - 0$ 00 00 00 /•0 30.2. Total /ft (71 229" 37 /0 3-7 4-7 3/ 22.4 •3,1 /oo. Number Certain Doubtfu Total Per Cent Certain Doubtful Total 191
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.