estimator
举一反三
- The sample variance is an unbiased estimator of the population variance.
- Which estimator is positive semi-definite? 未知类型:{'options': ['long run variance-covariance estimator [img=11x24]17de8379772258d.png[/img]=[img=51x65]17de837982326d0.png[/img]([img=17x47]17de83798f44d1a.png[/img])[img=12x24]17de83799af1362.png[/img](j)', 'OLS', 'Newey and West (1987) HAC estimator', 't test statistic'], 'type': 102}
- The sample variance is an unbiased estimator of the population variance. A: 正确 B: 错误
- An unbiased estimator is a sample statistic, which has an expected value equal to the value of the population parameter.
- A point estimator will be unbiased if the A: expected value of the point estimator equals the value of the population parameter B: sample size is greater than 30 or np ³ 5 and n(1-p) ³ 5 C: sampling distribution is normally distributed D: value of the population parameter is known