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43. El informe anual de Dennis Industries incluyo las siguientes ganancias primarias por accion comun durante los pasados 5 anos: $2.68, $1.03, $2.26, $4.30 y

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43. El informe anual de Dennis Industries incluyo las siguientes ganancias primarias por accion comun durante los pasados 5 anos: $2.68, $1.03, $2.26, $4.30 y $3.58. Si supone que estos son los valores poblacionales: a) Cuales son las medias aritmeticas de las ganancias primarias por accion comun? 2.68 1.03 2.26 U= 2.77 4.30 3.58 b) : cual es la varianza? 13.85 (X-U) = (2.68-2.77)2 x (1.03- 2.77)2 x (2.26 -2.77)2 x(4.30 -2.77)2 x( 3.58- 2.77)2 = 1.16 5

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