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A simple random sample consists of five observations 2, 4,6, 7, 6. The point estimate of population standard deviation is : |
4 2.5 5 2 |
2 |
The correct answer is Option (4) → 2 To estimate the population standard deviation, $s=\sqrt{\frac{∑(x_i-\bar x)^2}{n-1}}$ $=\sqrt{\frac{9+1+1+4+1}{4}}=\sqrt{\frac{16}{4}}$ $=2$ |
