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3. En una encuesta de 53 clientes seleccionados al azar de un centro comercial, la cantidad media de dinero que se lleva es de $42,

3. En una encuesta de 53 clientes seleccionados al azar de un centro comercial, la cantidad media de dinero que se lleva es de $42, con una desviacin estndar de $78. Cul es el intervalo de confianza del 95% para la cantidad media de dinero que llevan los clientes del centro comercial?

1. ($ 39.1; $ 44.9)

2.[$24.4; $59.6]

3.[$21.0; $63.0]

4.[$14.4; $69.6]

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