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b:head_first_statistics:geometric_binomial_and_poisson_distributions [2019/11/07 09:55]
hkimscil [What does the Poisson distribution look like?]
b:head_first_statistics:geometric_binomial_and_poisson_distributions [2019/11/07 09:56] (current)
hkimscil [What does the Poisson distribution look like?]
Line 935: Line 935:
 마포 신한은행 지점에 시간당 은행에 방문하는 손님의 숫자: lambda = 30 마포 신한은행 지점에 시간당 은행에 방문하는 손님의 숫자: lambda = 30
  
-<​code>>​ dpois(x=1:​60,​ lambda=30) +<​code>​ 
- [1] 2.807287e-12 4.210930e-11 4.210930e-10 3.158198e-09 +> dpois(x=1:​60,​ lambda=30) 
- ​[5] ​1.894919e-08 9.474593e-08 4.060540e-07 1.522702e-06 + [1] 2.807287e-12 4.210930e-11 4.210930e-10 3.158198e-09 1.894919e-08 
- ​[9] ​5.075675e-06 1.522702e-05 4.152825e-05 1.038206e-04 + ​[6] ​9.474593e-08 4.060540e-07 1.522702e-06 5.075675e-06 1.522702e-05 
-[13] 2.395861e-04 5.133987e-04 1.026797e-03 1.925245e-03 +[11] 4.152825e-05 1.038206e-04 2.395861e-04 5.133987e-04 1.026797e-03 
-[17] 3.397491e-03 5.662486e-03 8.940767e-03 1.341115e-02 +[16] 1.925245e-03 3.397491e-03 5.662486e-03 8.940767e-03 1.341115e-02 
-[21] 1.915879e-02 2.612562e-02 3.407689e-02 4.259611e-02 +[21] 1.915879e-02 2.612562e-02 3.407689e-02 4.259611e-02 5.111534e-02 
-[25] 5.111534e-02 5.897924e-02 6.553248e-02 7.021338e-02 +[26] 5.897924e-02 6.553248e-02 7.021338e-02 7.263453e-02 7.263453e-02 
-[29] 7.263453e-02 7.263453e-02 7.029148e-02 6.589826e-02 +[31] 7.029148e-02 6.589826e-02 5.990751e-02 5.285957e-02 4.530820e-02 
-[33] 5.990751e-02 5.285957e-02 4.530820e-02 3.775683e-02 +[36] 3.775683e-02 3.061365e-02 2.416867e-02 1.859128e-02 1.394346e-02 
-[37] 3.061365e-02 2.416867e-02 1.859128e-02 1.394346e-02 +[41] 1.020253e-02 7.287524e-03 5.084319e-03 3.466581e-03 2.311054e-03 
-[41] 1.020253e-02 7.287524e-03 5.084319e-03 3.466581e-03 +[46] 1.507209e-03 9.620485e-04 6.012803e-04 3.681308e-04 2.208785e-04 
-[45] 2.311054e-03 1.507209e-03 9.620485e-04 6.012803e-04 +[51] 1.299285e-04 7.495876e-05 4.242949e-05 2.357194e-05 1.285742e-05 
-[49] 3.681308e-04 2.208785e-04 1.299285e-04 7.495876e-05 +[56] 6.887904e-06 3.625212e-06 1.875110e-06 9.534457e-07 4.767229e-07
-[53] 4.242949e-05 2.357194e-05 1.285742e-05 6.887904e-06 +
-[57] 3.625212e-06 1.875110e-06 9.534457e-07 4.767229e-07+
 > plot(dpois(x=1:​60,​ lambda=30), type = "​l"​) > plot(dpois(x=1:​60,​ lambda=30), type = "​l"​)
 > </​code>​ > </​code>​
-[{{:​b:​head_first_statistics:​pasted:​20191107-082959.png|Figure 1. lambda=30}}]+[{{:​b:​head_first_statistics:​pasted:​20191107-095627.png|Figure 1. lambda=30}}]
  
 lambda가 클 수록 좌우대칭의 종형분포를 이루고 ((Figure 1)), 작을 수로 오른 쪽으로 편향된 (skewed to the right) 혹은 양의방향으로 편향된(positively skewed) 분포를 ((Figure 2)) 이룬다. lambda가 클 수록 좌우대칭의 종형분포를 이루고 ((Figure 1)), 작을 수로 오른 쪽으로 편향된 (skewed to the right) 혹은 양의방향으로 편향된(positively skewed) 분포를 ((Figure 2)) 이룬다.
b/head_first_statistics/geometric_binomial_and_poisson_distributions.txt · Last modified: 2019/11/07 09:56 by hkimscil