A random sample consists of three observations 4, 7, 10. The point estimate of the population standard deviation is :
Answer & explanation
Correct answer: option 1
The correct answer is Option (2) → 3
The simple standard deviation is,
$s=\sqrt{\frac{∑(x_i-\bar x)^2}{n-1}}$
$\bar x=\frac{4+7+10}{3}=\frac{21}{3}=7$
$s=\sqrt{\frac{9+0+9}{2}}=\sqrt{\frac{18}{2}}=\sqrt{9}=3$