How to win at roulette - determining if there is a wheel bias with chi-squared test calculator
Comments
 Share
The version of the browser you are using is no longer supported. Please upgrade to a supported browser.Dismiss

 
Ft
%
123
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Still loading...
ABCDEFGHIJKLMNOPQRSTUVWXYZ
1
Your recorded frequencies for individual numbers (how many times did the number spun during your observation):Write your numbers belowSquared diffs (the differences beetween the expected frequency and your observed frequencies, squared)The chi-square test tells you, if the frequencies in your sample are statistically different from the ones that would have came up if the spins were perfectly random.
2
00,01826150475
3
10,01826150475Expected frequency (how many times would a number spin, if the wheel was perfectly random):0,1351351351
4
20,01826150475
5
30,01826150475Your chi-squared value:61,6
6
40,01826150475Is there a wheel bias? (with 99% percent accuracy):YES
7
50,01826150475
8
60,01826150475
9
723,477720964Some visual help
10
80,01826150475
11
90,01826150475
12
100,01826150475
13
110,01826150475
14
120,01826150475
15
130,01826150475
16
140,01826150475
17
150,01826150475
18
160,01826150475
19
170,01826150475
20
180,01826150475
21
1923,477720964
22
200,01826150475
23
210,01826150475
24
220,01826150475
25
230,01826150475
26
240,01826150475
27
250,01826150475
28
260,01826150475
29
270,01826150475
30
280,01826150475
31
290,01826150475
32
300,01826150475
33
310,01826150475
34
320,01826150475
35
330,01826150475
36
340,01826150475
37
350,01826150475
38
3610,7479912345
39
Sum:58,324324324
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Loading...
 
 
 
Chi-squared test for wheel bias