What is the mean of the data set?

12, 17, 16, 10, 20, 13, 14, 14, 12, 12, 19, 18

A. 14.00

B. 14.75

C. 13.50

D. 15.75

The answer is B because if you add all the numbers up and divide then by the amount of numbers there are then you will end up with the mean

The answer is given by the second choice: letter B. 14.75 is the answer because to get the mean, you should add all the numbers and then divide it by how many numbers there are. For example, in this case, you add 12, 17, 16, 10, 20, 13, 14, 14, 12, 12, 19, 18 to each other. You will get the answer 172. After that, you should divide 172 by 12 because there are 12 numbers in the data set.