Answer :
to find the mean (average), u add up all the numbers, then divide by how many numbers there are.
(102 + 105 + 103 + 104 + 106 + 103 + 101) / 7 = 724/7 = 103.42..rounds to 103.4
(102 + 105 + 103 + 104 + 106 + 103 + 101) / 7 = 724/7 = 103.42..rounds to 103.4