FREQUENCY DISTRIBUTION TABLE 
      A table containing array data have been grouped by 
      class or specific categories .  
                                      How to make 
                                              it? 
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          SEE This Data
      50    32     33     73    47     45    79     40    70     38
      72    61     76     65    56     54    58     54    76     85
      52    74     40     68    42     75    43     48    44     82
      54    62     77     45    67     66    65     66    46     35
      56    85     57     58    59     55    56     47    61     69
      25    63     64     28    52     54    23     33    48     36
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              FIRST STEPS ARE 
           MAKE A FREQUENCY 
           DISTRIBUTION TABLE 
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        STEP 01 :
               SET NUMBER OF CLASSES  (Jumlah Kelas JK)
                 JK = 1 + 3,322 log n
                                                          H.A. Sturges (1926) 
               JK = number of classes
               n   = the number of observations (data)
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            Form the data, number of classes 
            are
        JK = 1 + 3,322 log 60
            = 1 + 3,322 (1,778)
            = 1 + 5,907
            = 6,907 ≈ 7 class
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