Question

what is the mean? -1 -1 0 0 0 -2 -3 -2 0

Explanation:

Step1: Calculate the sum of the data

$$\begin{align*} &(-1)+(-1)+0 + 0+0+(-2)+(-3)+(-2)+0\\ =&-1 - 1-2 - 3-2\\ =&-9 \end{align*}$$

Step2: Count the number of data points

There are \(n = 9\) data points.

Step3: Calculate the mean

The formula for the mean \(\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}\). Substitute \(\sum_{i=1}^{n}x_{i}=-9\) and \(n = 9\) into the formula: \(\bar{x}=\frac{-9}{9}=-1\)

Answer:

\(-1\)