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

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
3
10Expected frequency (how many times would a number spin, if the wheel was perfectly random):0
4
20
5
6
40Is there a wheel bias? (with 99% percent accuracy):#DIV/0!
7
50
8
60
9
70Some visual help
10
80
11
90
12
100
13
110
14
120
15
130
16
140
17
150
18
160
19
170
20
180
21
190
22
200
23
210
24
220
25
230
26
240
27
250
28
260
29
270
30
280
31
290
32
300
33
310
34
320
35
330
36
340
37
350
38
360
39
Sum:00
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