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

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TABLE VIII
CHI SQUARE TEST OF REVISED KNOWNS VERSUS
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UNKNOWNS ON THE BASIS OF COLOR
Adjusted
x2 '
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Number of
Number of
Number of
(K-n} 2
Color
KNOWNS
KNOWNS {K}
UNKNOWNS ( n)
K
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• White
281
95
112
3.04
Metallic
298
101
76
6. 19
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Not stated
189
64
62
0.06
Orange
117
39
49
2.56
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Red
92
31
33
0. 13
Yellow
90
30
31
0.03
Green
32
11
14
0.82
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Blue
29
10
26}
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0.57
Other
158
53
31
Total
1286
434
434
13.40
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Degrees of freedom
7
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5%
14. 1
1%
18. 5
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70
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