A biased estimator may be preferable to an unbiased estimator if: G) a) the unbiased estimator has substantially less variability than the biased one. O b) The only occasion where one would use a biased estimator is if an unbiased estimator did not exist. 0 c) the biased estimator has more variability than the unbiased one. Q d) the biased estimator has substantially less variability than the unbiased one. The ___________ is an interval or set of numbers specified such that if the test statistic exceeds this limit, the status quo of H0 is overturned. G) a) limit statistic O b) numeric limiting interval 0 c) confidence interval 0 d) rejection region Which of the following options would serve as an intuitive estimate of the parameter U1 - U2 ? O a) S1 - S2 Ob) X1 - X2 O c) X1 - 01 Od) X2 - M2