Question

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

Explanation:

Step1: Calculate the sum of data items

$$2 + 4+3 + 6+9 + 1+7 + 7=39$$

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 \(\sum_{i=1}^{n}x_{i}=39\) and \(n = 8\) into the formula: \(\bar{x}=\frac{39}{8}=4.875\)

Answer:

\(4.875\)