Question

What is the mean of this data set
12, 13, 15, 28, 28, 30, 42

Answer 1

The mean of this data set is
`\mu = 24`

Explanation:

By definition, the mean of a data set
`x_1, x_2, x_3, ..., x_n` is

`\mu = (\sum^n_i x_i)/(n)`

Where n is the total number of data.

In this case we have 7 data

12, 13, 15, 28, 28, 30, 42

So the mean is:

`\mu = (12+ 13 +15 +28 +28 +30+ 42)/(7)`

`\mu = 24`