課程名稱：分析化學一
課程性質︰化學系必帶
課程教師︰林萬寅
開課學院：理學萬
開課系所︰化學系
考試日期（年月日）︰2010/10/11
考試時限（分鐘）：15分鐘
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題：
1 Two students analyzed the calcium(in wt%) of a mineral knowm to contain
5.00% Ca and obtained the following results.
Student Number of measurements Confidence limit(95%)
__________________________________________________________________________
A 7 4.10~4.90
B 9 4.58~5.18
__________________________________________________________________________
(a)Do the results of the two students differ from the theoretical value at
95% confidence level? 10%
(b)Calculate the standard deviations for the results of both students 10%
(c)Calculate the pooled standard deviationfor the two students 10%
(d)Do the results of the two students differ from each other at 95% confidence
level(assuming no significant for the two standard deviations). 10%
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