Based on 'Explaining the Gibbs sampler', C. Casella
and E.I. George, Amer. Statist. 46 (3) (1992), 167-174.

Histogram (cf. Fig. 1))

         t       Obs       Exp      Diff      Ratio    Comp of X2

         0        25        23         2      1.050        0.060
         1        35        40        -5      0.873        0.649
         2        46        50        -4      0.918        0.340
         3        62        55         7      1.126        0.880
         4        58        55         3      1.038        0.079
         5        61        53         8      1.137        1.003
         6        41        49        -8      0.833        1.364
         7        37        43        -6      0.856        0.902
         8        47        36        11      1.288        3.028
         9        26        29        -3      0.882        0.412
        10        19        22        -3      0.837        0.604
        11        16        16         0      0.969        0.016
        12        14        11         3      1.252        0.711
        13         8         6         2      1.163        0.182
        14         4         3         1      1.085        0.027
        15         1         1         0      0.636        0.208
        16         0         0         0      0.000        0.418

Chi-squared equals 10.883 on 16 degrees of freedom

Estimated densities (cf. Fig. 3)

         t       Obs       Exp      Diff      Ratio    Comp of X2

         0        25        23         2      1.050        0.060
         1        40        40         0      0.997        0.000
         2        49        50        -1      0.978        0.025
         3        53        55        -2      0.963        0.076
         4        54        55        -1      0.966        0.065
         5        51        53        -2      0.950        0.132
         6        47        49        -2      0.955        0.098
         7        42        43        -1      0.971        0.036
         8        35        36        -1      0.959        0.061
         9        29        29         0      0.984        0.008
        10        22        22         0      0.969        0.022
        11        17        16         1      1.030        0.014
        12        12        11         1      1.073        0.060
        13         8         6         2      1.163        0.182
        14         4         3         1      1.085        0.027
        15         2         1         1      1.272        0.116
        16         0         0         0      0.000        0.418

Chi-squared equals 1.399 on 16 degrees of freedom.
Histogram (n random)

 t       Obs    Histogram

 0        26    **************************
 1        41    *****************************************
 2        52    ****************************************************
 3        55    *******************************************************
 4        61    *************************************************************
 5        54    ******************************************************
 6        38    **************************************
 7        41    *****************************************
 8        30    ******************************
 9        26    **************************
10        25    *************************
11        14    **************
12        11    ***********
13        11    ***********
14         9    *********
15         2    **
16         0    
17         0    
18         2    **
19         0    
20         1    *
21         0    

Estimated densities (n random; cf. Fig. 5)

 t       Obs    Estimate

 0        21    *********************
 1        41    *****************************************
 2        51    ***************************************************
 3        55    *******************************************************
 4        54    ******************************************************
 5        51    ***************************************************
 6        46    **********************************************
 7        40    ****************************************
 8        34    **********************************
 9        28    ****************************
10        21    *********************
11        16    ****************
12        11    ***********
13         8    ********
14         5    *****
15         3    ***
16         2    **
17         1    *
18         0    
19         0    
20         0    
21         0