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Czas oczekiwania (min) w 8 obsługach: 5, 7, 6, 8, 4, 5, 6, 7 . Oblicz odchylenie standardowe próby
Czas oczekiwania (min) w 8 obsługach: 5, 7, 6, 8, 4, 5, 6, 7 . Oblicz odchylenie standardowe próby
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