Question

find the mean for the following group of data items. 80, 20, 50, 20, 40 the mean is (type an integer or a decimal.)

Explanation:

Step1: Sum the data items

$$80 + 20+50 + 20+40=210$$

Step2: Count the number of data items

There are \(n = 5\) data items.

Step3: Calculate the mean

The mean formula is \(\bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}\). Substitute \(\sum_{i=1}^{n}x_{i}=210\) and \(n = 5\) into the formula: \(\frac{210}{5}=42\)

Answer:

\(42\)