the school district compared how many math teachers each high school has. what is the mean of the numbers?

Explanation:

Step1: Identify the data values

Moore High: 2, River High: 2, Hillview High: 9, Green High: 3, Lincoln High: 9, Westside High: 2, Thompson High: 6, Northside High: 7

Step2: Calculate the sum of data values

$2 + 2+9 + 3+9+2+6+7=40$

Step3: Determine the number of data - points

There are 8 high - schools, so $n = 8$.

Step4: Calculate the mean

The mean $\bar{x}=\frac{\text{Sum of data values}}{n}=\frac{40}{8}=5$

Answer:

5