Answer:
The mean of this data set is [tex]\mu = 24[/tex]
Step-by-step explanation:
By definition, the mean of a data set [tex]x_1, x_2, x_3, ..., x_n[/tex] is
[tex]\mu = \frac{\sum^n_i x_i}{n}[/tex]
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:
[tex]\mu = \frac{12+ 13 +15 +28 +28 +30+ 42}{7}[/tex]
[tex]\mu = 24[/tex]
