[1, 4, 8, 13, 28, 34]
Calculate the mean of a given array of numbers.
The mean is the sum of all values in the array divided by the total number of values. In this case, the sum of the values is equal to 1 + 4 + 8 + 13 + 28 + 34 = 88. And since there are six values in the array, the mean is equal to 88/6 = 14.67.