Chi-square test
Statistical test jo har pocket ke observed hits ko expected n/37 se compare karta hai. Isse tay kiya jaata hai ki wheel biased hai ya nahi.
Sandarbh mein
37 pocketssaamanPocketRotor ke 37 numbered khaanon mein se ek. Doosre naam: slot, cup.Poora padhein → par (observed − expected)² / expected jodiye; phir 36 degrees of freedomlabDegrees of freedomKisi statistic mein independent values ki sankhya. 37 pockets par chi-square test ke liye yeh 36 hai, kyunki counts ka jod total ke barabar hona chahiye.Poora padhein → wale chi-square distribution se compare kijiye.
Karl Pearson ne yeh test 1900 mein publish kiya, aur unke pehle examples mein se ek tha Monte Carlo roulette ke 26,306 record kiye gaye spins, jo unhe shak ki had tak non-random lage. Baad ke analysis ne bataya ki record karne wale journalists ne kuch results khud gadh liye the.