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The point estimate of the population variance for a random sample consisting of five observations: 11, 15, 15, 19 and 20 is : |
10.4 13 16 12.75 |
10.4 |
The correct answer is Option (1) → 10.4 The point estimate of the population variation is, $s^2=\frac{∑(x_i-\bar x)^2}{n}$ Mean, $\bar x=\frac{11+15+15+19+20}{5}=16$ $s^2=\frac{25+1+1+9+16}{5}=10.4$ |
