Herson-actividad-unidad-2.docx

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Herson Zambrano Actividad 1 unidad 2.

Al analizar un grupo de 30 máquinas se determinó que de 10 observaciones realizadas, 3 de las máquinas estaban siempre inactivas (p) y en marcha las restantes (q). Con base en lo anterior: a. Determine por el método estadístico el número de observaciones a realizar, si se desea un nivel de confianza del 95% y un margen de error de ± 5%. p= 10% 𝜎𝑝 =

q = 90% √𝑝𝑞 𝑛

95%𝜎𝑝 = 5 ⇒ 𝝈𝒑 = 𝟐. 𝟓 2.5 =

10𝑥90 900 √10𝑥90 ≅𝑛= ≅𝑛= = 144 2 𝑛 (2.5) 6.25

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