10. An estimator that has small variance (but may be biased) is called precise. An estimator that has small MSE (Mean squared error) is called accurate. To illustrate: A standard 100-gm mass was weighted many, many times, on scale A. Similarly, on scale B, and finally on scale C. The distribution of measurements is summarized below
Scale A: $\mu=100.08, \sigma=0.01$
Scale B: $\mu= 99.98, \sigma=0.02$
Scale C: $\mu=100.00, \sigma=0.05$
Which scale is most precise? Which scale is most accurate?
(A) B is most precise, A is most accurate
(B) A is most precise, B is most accurate
(C) A is most precise and is also most accurate
(D) B is most precise and is also most accurate
(E) Since the population mean is not given, there is no answer to this question. I