The Concentration (In % by Volume) of Methyl Tert-Butyl Ether $$\begin{array} { c c } \text { Sample } & \% \text { (v/v) } \boldsymbol { M T B E } \\1 & 5.01 \\2 & 4.95 \\3 & 5.10 \\4 & 5.15\end{array}$$

question 23

Multiple Choice

The concentration (in % by volume) of methyl tert-butyl ether (MTBE) was determined in four samples of the same gasoline. What is the average value, and which measurement was the most accurate, compared to the average? $$\begin{array} { c c } \text { Sample } & \% \text { (v/v) } \boldsymbol { M T B E } \\1 & 5.01 \\2 & 4.95 \\3 & 5.10 \\4 & 5.15\end{array}$$

• A) 5.05, sample 1
• B) 5.05, sample 2
• C) 5.05, sample 3
• D) 5.05, sample 4
• E) 5.0525, sample 3

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