Mean of Poisson distribution (0.0<x<20.0) - Negative to end:
Poisson-distributed deviate, mean  4.00 of  10000 points
    x     p(x)     graph:
     0   0.0182    ***                                              
     1   0.0720    **************                                   
     2   0.1476    *****************************                    
     3   0.1922    **************************************           
     4   0.1943    **************************************           
     5   0.1605    ********************************                 
     6   0.1053    *********************                            
     7   0.0593    ***********                                      
     8   0.0281    *****                                            
     9   0.0128    **                                               
    10   0.0061    *                                                
    11   0.0024                                                     
    12   0.0011                                                     
    13   0.0001                                                     
    14   0.0000                                                     
    15   0.0000                                                     
    16   0.0000                                                     
    17   0.0000                                                     
    18   0.0000                                                     
    19   0.0000                                                     
    20   0.0000                                                     
Mean of Poisson distribution (0.0<x<20.0) - Negative to end:
Poisson-distributed deviate, mean 16.00 of  10000 points
    x     p(x)     graph:
     0   0.0000                                                     
     1   0.0000                                                     
     2   0.0000                                                     
     3   0.0000                                                     
     4   0.0002                                                     
     5   0.0010                                                     
     6   0.0020                                                     
     7   0.0066    *                                                
     8   0.0145    **                                               
     9   0.0231    ****                                             
    10   0.0330    ******                                           
    11   0.0495    *********                                        
    12   0.0629    ************                                     
    13   0.0827    ****************                                 
    14   0.0914    ******************                               
    15   0.1016    ********************                             
    16   0.0962    *******************                              
    17   0.0932    ******************                               
    18   0.0836    ****************                                 
    19   0.0737    **************                                   
    20   0.0540    **********                                       
Mean of Poisson distribution (0.0<x<20.0) - Negative to end: