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Un fabricante de salsa de tomate est en proceso de decidir si produce o no una versin picante. El Departamento de Investigacin de Mercados de

Un fabricante de salsa de tomate est en proceso de decidir si produce o no una versin picante. El Departamento de Investigacin de Mercados de la compaa us un sondeo telefnico nacional de 6000 casas y encontr que 335 de ellos compraran la salsa con picante. Un estudio ms extenso hecho dos aos antes mostr que 5 % de las casas comprara la marca. Con un nivel de significancia del 2 %, determine el valor Z observado

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