A warehouse scale is miscalibrated: it reports every package as weighing exactly 5 g more than its true weight. The error is the same 5 g on every package — there is no extra random noise.
An analyst weighs a random sample of packages on this scale and reports the sample mean of the scale readings as her estimate of the true population mean weight . The true weights have a finite population standard deviation .
She currently uses and is about to switch to . Which statement about her estimate is correct?
Select all that apply.