n

${\widehat{\eta }}_{\text{mean}}$

${\widehat{\theta }}_{mean}$

$\widehat{\eta }$ 的样本标准差

$\widehat{\theta }$ 的样本标准差

20

1.098

7.256

0.256

6.480

50

1.036

5.626

0.146

2.070

100

1.017

5.269

0.101

1.232

500

1.003

5.048

0.049

0.511