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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
8. The FDA is comparing the mean ea feine contents of two brands of cola. Independent random samples of 6-oz. cans of
Heach brand were selected and the caffeine content of each can determined. The study provided the following summary
information.
Brand A Brand B
Sample size
20
Variance 1.2
How many cans of each soda would need to be sampled in order to estimate the difference in the mean caffeine content to
within 10 with 90% reliability?
(A)
(B)
(C) 
(D)