Question

Find the mean of the following data.

Data 1	Data 2	Data 3	Data 4	Data 5
$1$	$3$	$5$	$7$	$9$

• A. $5$
• B. $25$
• C. $0.5$
• D. $0.25$

Answer 1

The correct option is A $5$

We know,

$\text{Mean}=\frac{\text{Sum of all data points}}{\text{Total number of data points}}$

$=\frac{1+3+5+7+9}{5}$
$=\frac{25}{5}$
$=5$

Hence, the mean of the given data points is $5$.

$\underset{–}{\text{Note:}}$ We can see that the mean, $5$ is between the maximum $\left(9\right)$ and minimum $\left(1\right)$ values of the given data set, and the mean $5$ is one of the data points of the given data set $\{1,3,5,7,9\}$. But it may be possible that the mean is NOT one of the entries of the data set.