6- considerando os conjuntos de dados: a- 3, 5, 2, 6, 5, 9, 5, 2, 7, 6 b- 20, 9, 7, 2, 12, 7, 20, 15, 7 c- 51,6; 48,7; 50,3; 49,5; 48,9 d- 15, 18, 25, 13, 10, 16, 14