(Analysis of Reports of Unidentified Aerial Objects)

Approved For Release 2005/07/20 : CIA-RDP81R00560R000100060001-5 TABLE XII CHI SQUARE TEST OF REVISED KNOWNS VERSUS UNKNOWNS ON THE BASIS OF SPEED Speed Number of KNOWNS Adjusted Number of KNOWNS (K) Number of UNKNOWNS (n) $X^2$, $\frac{(K-n)^2}{K}$ Stationary 196 66 53 2.56 Less than 100 mph 128 43 26 6.72 100 to 400 mph 156 53 58 0.47 Over 400 mph 291 98 145 28.54 Meteor-like 24 8 16 Not stated 491 166 136 5.42 Total 1286 434 434 43.71 Degrees of freedom 4 5% 9.5 1% 13.3 74 Approved For Release 2005/07/20 : CIA-RDP81R00560R000100060001-5