X-bar control chart for 6-inchnbspnailsevery ve minutes a, Ask an Expert

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X-BAR CONTROL CHART FOR 6-INCH NAILS

Every ?ve minutes, a random sample of 3 six-inch nails is selected from a manufactured lot and measured for conformance to the speci?cation. The data in Table 22.1 is a record of the measurements determined over the ?rst hour of a shift. Obtain an X-bar chart and identify whether or not the manufacturing process is "in-control".

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