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Ji cuadrada
Ji cuadrada
perlaaguilarserrano
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Jan 23, 2015
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ji
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Jan 23, 2015
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Slide 1
Distribución Ji Cuadrada Miguel Ángel Santos Omar
Slide 2
¿Qué es? Es la técnica estadística utilizada con mayor frecuencia para el análisis de conteo o datos de frecuencia.
Slide 3
FRECUENCIA ESPERADA Es lo que se espera obtener si repites el experimento infinitas veces
Slide 4
FRECUENCIA OBSERVADA Es la que puedes medir físicamente Ejemplo dado 100 veces , se observa cuantas veces sale cada numero
Slide 5
Cuadro teórico para el coeficiente “Q” de Kendall A B C D
Slide 6
Slide 7
EJEMPLO fo Frecuencia Obtenida 40 10 15 35
Slide 8
A B C D 40 10 15 35
Slide 9
A 40 B 10 C 15 D 35 (40*35)-(10*15) (40*35)-(10*15) (1400)-(150) (1400)+(150) = 1250 1550 = .80
Slide 10
fe FRECUENCIA ESPERADA 40 10 n1 15 35 n2 n3 n4 N 40 10 50 15 35 50 55 45 100
Slide 11
N= 100 N1= 50 N2= 50 N3 =55 N4=45 n1 n2 n3 n4 N n1 n2 n3 n4 N
Slide 12
40 27.5 10 27.5 50 25 27.5 35 27.5 50 55 45 100
Slide 13
Casilla fo fe fo - fe ( fo – fe) 2 A 40 27.5 12.5 156.25 5.68 B 15 27.5 - 12.5 156.25 5.68 C 10 27.5 - 17.5 306.25 11.13 D 35 27.5 7.5 56.25 2.04 100.0 100.0 Ji cuadrada 24.53 Casilla fo fe fo - fe ( fo – fe) 2 A 40 27.5 12.5 156.25 5.68 B 15 27.5 - 12.5 156.25 5.68 C 10 27.5 - 17.5 306.25 11.13 D 35 27.5 7.5 56.25 2.04 100.0 100.0 Ji cuadrada 24.53
Slide 14
TRABAJO Casilla fo fe fo - fe ( fo – fe) 2 A B C D Ji cuadrada = Casilla fo fe fo - fe ( fo – fe) 2 A B C D Ji cuadrada = 20 30 25 25
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