Answer:
mean-0.5263158
median-8
Step-by-step explanation:
adding up all of the numbers then dividing the total by how many numbers there were gives you the mean
(11+8+10+10+10+9+4+9+7+5+11+8+9+11+10+10+10+9+10=115/19=0.5263158)
to find the median-
4,5,7,8,9,10,11
then cross out one number from each end until you get to the middle number (in this case the middle number (number in the middle of the line) is 8)
(in a case where here are 2 numbers left in the middle, you would find the mean of the two numbers and the dividing the total by 2)