Question

find the mean of the integers. 19. -3, -8, 12, -15, 9

Explanation:

Step1: Calculate the sum of the integers

$$\begin{align*} &-3+( - 8)+12+( - 15)+9\\ =&(-3 - 8-15)+(12 + 9)\\ =&-26 + 21\\ =&-5 \end{align*}$$

Step2: Calculate the number of integers

There are \(n = 5\) integers.

Step3: Calculate the mean

The formula for the mean \(\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}\), so \(\bar{x}=\frac{-5}{5}=-1\)

Answer:

\(-1\)