prob - de que 10 partículas entren al contador en un mini...

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-Binomial Calcule la probabilidad de obtener un 8 dos veces en 4 lanzamientos de un par de dados. b(r, n, p)= 8 ! 6 ! ( 2 ) ! ( 0.60 ) 6 ( 0.4 ) 2 = 28 ( 0.0466 ) ( 0.16 ) ¿ 0.2090 = 20.9 -Hipergeometrica De 10 empleados, 4 han estado con la compañía 5 o más años. Si se escoge al azar a 6 empleados del grupo de 10. Calcule la probabilidad de que exactamente 2 tengan 5 o más años de antigüedad. p(X, N, XT, n)= ( 4 2 )( 10 4 6 2 ) ( 10 6 ) = ( 6 ) ( 6 4 ) 210 = ( 6 ) ( 15 ) 210 = 0.4285 = 43
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-Poisson Durante un experimento el promedio de partículas radioactivas que pasan a través de de un contador en un mini segundo son 8. ¿Cuál es la probabilidad
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Unformatted text preview: de que 10 partículas entren al contador en un mini segundo? P(x, λ)= ℮ − λ ( λ ) x x! P (10, 4)= ℮ − 8 ( 8 ) 10 10 ! = 8 10 ℮ 8 ( 10 ! ) = 0.0992 = 10-Normal La media de los pesos de 300 estudiantes es de 100 libras y la desviación estándar es de 10 libras, suponiendo que los pesos se distribuyen normalmente determine cuantos estudiantes pesan entre 85 y 125 libras. X= 85 y 125 libras μ = 120 libras σ = 15 libras Ζ = X − μ σ = 85 − 120 15 =− 2.3 = 0.4893 Ζ = 125 − 120 15 = 0.33 = 0.1293...
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