Explanation:
The formula to calculate the mean is
[tex]\bar{x}=\frac{1}{n}\sum_{i\mathop{=}1}^nx_i[/tex]
where the symbol
∑
represents a summation from the first value
[tex]x_1\rightarrow first\text{ value}[/tex]
to the last value
[tex]x_n\rightarrow last\text{ value}[/tex]
where n represents the number of elements in the data set.
In this case, the data set has 15 elements
That means that the value of n is 15:
[tex]n=15[/tex]
whic
