                ┌                                        ┐ 
   [-4.0, -3.5) ┤ 2                                        
   [-3.5, -3.0) ┤ 14                                       
   [-3.0, -2.5) ┤▇ 39                                      
   [-2.5, -2.0) ┤▇▇▇ 166                                   
   [-2.0, -1.5) ┤▇▇▇▇▇▇▇▇ 445                              
   [-1.5, -1.0) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 880                      
   [-1.0, -0.5) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 1597        
   [-0.5,  0.0) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 1888   
   [ 0.0,  0.5) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 1889   
   [ 0.5,  1.0) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 1528         
   [ 1.0,  1.5) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 917                     
   [ 1.5,  2.0) ┤▇▇▇▇▇▇▇ 407                               
   [ 2.0,  2.5) ┤▇▇▇ 174                                   
   [ 2.5,  3.0) ┤▇ 42                                      
   [ 3.0,  3.5) ┤ 9                                        
   [ 3.5,  4.0) ┤ 3                                        
                └                                        ┘ 
                                Frequency