#Exemplo 3.18: NĂ­vel de albumina no sangue x=c(4.44,4.47,4.48,4.51,4.54,4.54,4.61,4.64,4.66,4.68, 4.68,4.69,4.71,4.73,4.76,4.76,4.76,4.81,4.86,4.86, 4.87,4.88,4.9,4.9,4.95,4.95,4.96,4.97,4.98,4.98, 4.99,5,5.01,5.01,5.01,5.02,5.04,5.05,5.08,5.09, 5.09,5.1,5.11,5.11,5.16,5.17,5.18,5.18,5.19,5.24, 5.24,5.26,5.27,5.27,5.29,5.32,5.35,5.46,5.5,5.85) length(x) # 1o. Quartil 25% de 60=15 abaixo de Q1 e 45 acima x summary(x) # Percentil de ordem 80 (P80)=48 valores abaixo de si # e 12 acima # P80=(5.18+5.19)/2=5.185