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

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TABLE VI
CHI SQUARE TEST OF KNOWNS VERSUS
UNKNOWNS ON THE BASIS OF SPEED
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Adjusted
x2,
Number of
Number of
Number of
{K-n) 2
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Speed
KNOWNS
KNOWNS (K)
UNKNOWNS ( n)
K
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Stationary
249
61
53
1. 05
Less than 100 mph
154
38
26
3.79
100 to 400 mph
181
45
58
3.76
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Over 400 mph
403
99
145
21. 37
Meteor-like
83
20
16
0.80
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Not stated
695
171
136
7. 16
Total
1765
434
434
37. 93
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Degrees of freedom
5
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5%
11. 1
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1%
15. 1
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66
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