If a class of 27 students has a mean score of 72 on a test, what is the sum of the 27 deviations of the scores from 72?
The dot plot below shows the number of goals scored by a school’s soccer team in 7 games so far this season. Use the “balancing” process to explain why the mean number of goals scored is 3. List all of the deviations and calculate the sum of the deviations. Explain your answer.