13 united federation states 13 is Unlucky For Some
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Mean: 16 Median: 17 Mode: 13 Range: 6
Mean = (15 + 12 + 16 + 13)/4 = 56/4 = 14
If you mean 13/20 then as a decimal it is 0.65
The mean is 9.
mean average = sum of dataset / number of items in dataset = (14 + 18 + 13 + 15) / 4 = 60/4 = 15