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

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TABLE III
CHI SQUARE TEST OF KNOWNS VERSUS
UNKNOWNS ON THE BASIS OF NUMBER
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Number of
Adjusted
x2,
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Objects Per
Number of
Number of
Number of
(K-n)2
Sighting
KNOWNS
KNOWNS (K)
UNKNOWNS (n)
K
1
1339
329
297
3. 11
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2
159
39
37
o. 10
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3-10
185
46
70
12. 52
11 or more
41
10
25
22. 50
Not stated
41
10
5
2.50
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Total
1765
434
434
40.73
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Degrees of freedom
4
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9.5
13.3
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63
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