Last year, nine employees of an electronics company retired. Their ages at retirement are listed below. Find the mean retirement age. Round your answer to the nearest tenth.
\[
\begin{array}{lll}
53 & 67 & 63 \\
50 & 67 & 58 \\
60 & 50 & 52
\end{array}
\]
57.8
58.0
57.1
56.5

Answer

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Answer

\( {Rounded\,Mean} = 57.8 \)

Steps

Step 1 ：\( {Sum} = 53 + 67 + 63 + 50 + 67 + 58 + 60 + 50 + 52 \)

Step 2 ：\( {Sum} = 520 \)

Step 3 ：\( {Mean} = \frac{Sum}{Number\,of\,employees} = \frac{520}{9} = 57.78\dots \)

Step 4 ：\( {Rounded\,Mean} = 57.8 \)