A simple random simple consists of five observation 2, 4, 6, 5, 8. The Point estimate of Population Standard deviation is
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → $\sqrt{5}$
Mean, $\bar x=\frac{2+4+6+5+8}{5}=\frac{25}{5}=5$
$s^2=\frac{∑(x_i-\bar x)^2}{n-1}=\frac{9+1+1+0+9}{5-1}$
$=\frac{20}{4}=5$
$⇒s=\sqrt{5}$