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
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
举一反三
- An unbiased estimator is a sample statistic, which has an expected value equal to the value of the population parameter.
- The sample variance is an unbiased estimator of the population variance.
- The problem with relying on a point estimate of a population parameter is that:
- The point estimation is to determine an interval bounded by 2 values such that the probability that the parameter value is within the interval is known.( )
- When a range of values is used to estimate a population parameter, it is called _______. A: a point estimate B: an interval estimate C: a statistical parameter D: a range estimate