Project Blue Book Special Report No. 14 (Analysis of Reports of Unidentified Aerial Objects)

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TABLE II
CHI SQUARE TEST OF KNOWNS VERSUS
UNKNOWNS ON THE BASIS OF COLOR
I
I
I
I
I
I
I
Adjusted
x2
Number of
Number of
Number of
(K-n)2
I
Color
KNOWNS
KNOWNS (K)
UNKNOWNS (n)
K
I
White
405
100
112
1. 44
Metallic
313
77
76
0. 01
Not stated
209
51
62
2.37
I
Orange
172
42
49
1. 17
Red
146
36
33
0.25
Yellow
128
31
31
0
I
Green
130
32
14
10. 13
Blue
67
17
26
4. 76
I
Other
195
48
31
6.02
Total
1765
434
434
26. 15
I
Degrees of freedom
8
I
15.5
I
20. 1
I
I
I
I
I
I
62
I