Question

find the mean for the following group of data items.
3, 2, 8, 6, 4, 9, 7, 1
the mean is \square. (type an integer or a decimal.)

Explanation:

Step1: Calculate the sum of data items

$$3 + 2+8 + 6+4 + 9+7 + 1=40$$

Step2: Count the number of data items

There are \(n = 8\) data items.

Step3: Calculate the mean

The formula for the mean \(\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}\). Substitute \(\sum_{i=1}^{n}x_{i}=40\) and \(n = 8\) into the formula: \(\bar{x}=\frac{40}{8}=5\)

Answer:

\(5\)