12
mean is adding all the terms and dividing by number of terms so once you add them all you be 108 and then divide by 9 giving you the mean, 12
Answer:
The mean should be 12.
Step-by-step explanation:
To find the mean of a range of numbers, you must simply add all of the numbers together and divide by how many numbers there are in the group.
In this case, I did 15+11+10+11+14+10+15+10+12, which came to be 108. I divided that by 9, since there are nine numbers, which gave me 12.
Hopefully this helps!