CUET Preparation Today
A simple random sample consists of three observations 7, 9, 11. The point estimate of the population standard deviation is : |
2.5 1.44 2 4 |
2 |
The correct answer is Option (3) → 2 $s=\sqrt{\frac{∑(x_i-\bar x)^2}{n-1}}$ Mean, $\bar x=\frac{7+9+11}{3}=9$ $s=\sqrt{\frac{4+0+4}{3-1}}=\sqrt{\frac{8}{2}}=2$ |
