An unbiased estimator is a sample statistic, which has an expected value equal to the value of the population parameter.
举一反三
- 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
- The test statistic measures how close the computed sample statistic has come to the hypothesized population parameter.
- The sample variance is an unbiased estimator of the population variance.
- When estimating population parameters, a point estimate is:? always equal to a population value.|a range of possible values for a population parameter.|the population mean.|a statistic that estimates a population parameter.
- Which of the following is a statistic that can be used to test hypotheses about a single population parameter？（ ） A: χ2 statistic B: F statistic C: Durbin Watson statistic D: t statistic