次成功时的试验次数，所以 P(X=k)=g-1p,k=1,2,… (2.4) 称此分布为几何分布.记为X~G(p. 10 20 Index in R TCode dgeom,rgeom pgeom,qgeom Code Previous Next First Last Back Forward 13次成功时的试验次数，所以 P(X = k) = q k−1 p, k = 1, 2, · · · . (2.4) 称此分布为几何分布. 记为 X ∼ G(p). 5 10 15 20 0.0 0.2 0.4 Index dgeom(0:20, p = 0.5) 5 10 15 20 0.0 0.2 0.4 0.6 0.8 Index dgeom(0:20, p = 0.8) in R ↑Code dgeom, rgeom pgeom, qgeom ↓Code Previous Next First Last Back Forward 13