Frequencies for hour variable in accident dataset :

    Time of |
Accident-Ho |
         ur |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         26        5.35        5.35
          1 |         17        3.50        8.85
          2 |         21        4.32       13.17
          3 |         11        2.26       15.43
          4 |          7        1.44       16.87
          5 |         10        2.06       18.93
          6 |          8        1.65       20.58
          7 |         17        3.50       24.07
          8 |          9        1.85       25.93
          9 |         10        2.06       27.98
         10 |         16        3.29       31.28
         11 |         13        2.67       33.95
         12 |          9        1.85       35.80
         13 |         18        3.70       39.51
         14 |         23        4.73       44.24
         15 |         21        4.32       48.56
         16 |         20        4.12       52.67
         17 |         20        4.12       56.79
         18 |         34        7.00       63.79
         19 |         43        8.85       72.63
         20 |         41        8.44       81.07
         21 |         33        6.79       87.86
         22 |         25        5.14       93.00
         23 |         29        5.97       98.97
         99 |          5        1.03      100.00
------------+-----------------------------------
      Total |        486      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016