Question

What is the mean of the data set

138,142,105,112,108,134,106,181,164,105

Express your answer as a decimal to the nearest tenth

Answer 1

To find mean all you have to do is add all the numbers up and divide ny how many numbers there are.  If you add them all together is equals 1295. now divide that number by the amount of numbers there are which is 10, and divide 1295 by 10.  You get 129.5