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Una empresa farmacutica afirma que cierto medicamento elimina el dolor de cabeza en un cuarto de hora en el 90% de los casos. Tomada una

Una empresa farmacutica afirma que cierto medicamento elimina el dolor de cabeza en un cuarto de hora en el 90% de los casos. Tomada una muestra de 200 pacientes a los que se les administro el medicamento y se observ que a 170 de ellos les desapareci el dolor. El estadstico de prueba es?

a. 2.996

b. 1.645

c. -2,357

d.-1.96

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