zad 4 licealicta: dla zestawu ponizej oblicz srednia artmetyczna, mediane, dominante i odchylenie standardowe. wartosc x | 8 | 9 | 12 | 15 | −−−−−−−−−−−−−−−−−−−−−|−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−| liczba wskazan | 3 | 6 | 5 | 2 |