n

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

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

$\widehat{\eta }$ 的样本标准差

$$ 的样本标准差

20

1.093

1.262

0.248

1.025

50

1.036

1.092

0.145

0.478

100

1.017

1.039

0.102

0.307

500

1.005

1.005

0.049

0.137