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試卷名稱：107年 - 107政大風管系碩士班招考︰統計學#110403
年份：107年
科目：研究所、轉學考(插大)◆統計學
18. To assess the accuracy of a laboratory scale, a standard weight that is known to weigh 1 gram is
repeatedly weighed a total of n times and the mean 
of the weighings is computed.
Suppose the scale readings are normally distributed with unknown mean and standard
deviation =0.01 g. How large should : be so that a 95% confidence interval for has a
margin of error of±0.0001?
(A) 100
(B)196
(C)10000
(D) 38416