Calculate this as you would any mean. Where p is the probability. This is found by adding the numbers in a data set and dividing by the number of observations in the data set.
Formula to Calculate Population Mean The population mean is the mean or average of all values in the given population and is calculated by the sum of all values in population denoted by the summation of X divided by the number of values in population which is denoted by N.
Sum all the values and divides the total by the count of numbers. Obviously the mean in the case of Table 1 does a good job of describing the data. A more advanced calculation is the mean deviation about the mean. Sample mean x 14.