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1.En un artculo acerca de un experimento para una vacuna de nios se presentaron los siguientes planteamientos: un experimento involucrando 1602 nios slo 14 de

1.En un artculo acerca de un experimento para una vacuna de nios se presentaron los siguientes planteamientos: "un experimento involucrando 1602 nios slo 14 de los 1070 que recibieron la vacuna desarrollaron la influenza, comparados con 95 de 532 que recibieron el placebo. La data se muestra en la tabla, con unnivel de significancia del 5% pruebe la independencia entre la variable de tratamiento (vacuna o placebo) y la variable que representa la influenza (desarrollan la influenza o no la desarrollan)". Es la vacuna efectiva?

Tratamiento

Desarroll la influenza

No desarroll la influenza

Total

Vacuna

14

1056

1070

Placebo

95

437

532

Total

109

1493

1602

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