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Cary Jensen · Answer 1 · 2023-03-13T03:49:48+0000

Solution

- The formula for finding the sample mean from the confidence interval is given below

$\begin{gathered} \text{Given the Confidence interval,} \\ (A_1,A_2) \\ \\ \therefore\operatorname{mean}=(A_1+A_2)/(2) \end{gathered}$

- Thus, we can find the sample means as follows

$\begin{gathered} A_1=5.4 \\ A_2=6.8 \\ \\ \therefore\operatorname{mean}=(5.4+6.8)/(2) \\ \\ \operatorname{mean}=(12.2)/(2) \\ \\ \operatorname{mean}=6.1 \end{gathered}$

Final Answer

The sample mean is 6.1 (OPTION B)

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