Question

If different values of variable $x$ are $9.8,5.4,3.7,1.7,1.8,2.6,2.8,8.6,10.5$ and $11.1$, find the mean $\overline{x}$.

• A. $5.8$
• B. $4.6$
• C. $5.4$
• D. None of these

Answer 1

The correct option is A $5.8$

The values are: $9.8,5.4,3.7,1.7,1.8,2.6,2.8,8.6,10.5$ and $11.1$.

We know, Mean is given by,

$\text{Mean}=\frac{\text{Sum of the elements}}{\text{Total number of elements}}$.

Here, number of observations $=10$.

Then, Mean = $\frac{9.8+5.4+3.7+1.7+1.8+2.6+2.8+8.6+10.5+11.1}{10}$

$⟹$ Mean = $\frac{58}{10}$ = $5.8$.

Therefore, option $A$ is correct.