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

1.317

7.245

0.305

7.213

50

1.244

5.566

0.173

2.025

100

1.224

5.283

0.121

1.261

500

1.206

5.059

0.0579

0.511