To find the mean in a set of data, you would first add up all your numbers which is 2,3,4,4,4,5,5,7,8,12,13,17. The total of that data is 84. Then when you are done with that divide 84 by the total number of numbers in the data, in which number of numbers you have is 12. The final answer is 7 because 12 X 7 = 84 in which 7 is the correct answer.
