CUET Preparation Today
A random sample consists of three observations 4, 7, 10. The point estimate of the population standard deviation is : |
3 2 5 4 |
3 |
The correct answer is Option (2) → 3 The simple standard deviation is, $s=\sqrt{\frac{∑(x_i-\bar x)^2}{n-1}}$ $\bar x=\frac{4+7+10}{3}=\frac{21}{3}=7$ $s=\sqrt{\frac{9+0+9}{2}}=\sqrt{\frac{18}{2}}=\sqrt{9}=3$ |
