Calculating the mean, or average, of a data set is actually pretty easy. You just add all the values of the data, and then divide that sum by the number of data points. This can be a challenging task if the data consists of a large amount of numbers. In those cases you can use Excel to do the job for you. 
     Excel Instruction
Excel.         =AVERAGE(
Enter.         Example 1
Below, you can see an overview of how many pieces of candy eight of the students in a class ate this weekend:
Find the mean of this data.
Excel,         into         individual         cells.         =AVERAGE(
Enter. Simple as         that!         
      
The result is:
      
From Excel you see that the mean amount of candy eaten this weekend is 10         pieces.