The depth of a silicon wafer is targeted at 1.015 mm. If properly functioning, the process produces items with a mean of 1.015 mm and a standard deviation of ±0.004 A sample of 16 items is measured once each hour. The sample means for the past 12 hours are given in the table below. From the table of data, determine the most accurate mean control chart. $\begin{array}{cccccc}
\text { Hour }&1 & 2 & 3 & 4 & 5 & 6 \
\
\text { Mean }&1.013 & 1.015 & 1.016 & 1.017 & 1.014 & 1.013 \
\text { Hour }&7 & 8 & 9 & 10 & 11 & 12 \
\
\text { Mean }&1.014 & 1.017 & 1.016 & 1.013 & 1.017 & 1.016
\end{array}$

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The Answer of The depth of a silicon wafer is targeted at 1.015 mm. If properly functioning, the process produces items with a mean of 1.015 mm and a standard deviation of ±0.004 A sample of 16 items is measured once each hour. The sample means for the past 12 hours are given in the table below. From the table of data, determine the most accurate mean control chart. $\begin{array}{cccccc}
\text { Hour }&1 & 2 & 3 & 4 & 5 & 6 \
\
\text { Mean }&1.013 & 1.015 & 1.016 & 1.017 & 1.014 & 1.013 \
\text { Hour }&7 & 8 & 9 & 10 & 11 & 12 \
\
\text { Mean }&1.014 & 1.017 & 1.016 & 1.013 & 1.017 & 1.016
\end{array}$

The Depth of a Silicon Wafer Is Targeted at 1