For an xbar and R control chart use the following summary statistics

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Home>Mathematics homework help>Numerical analysis homework help>For an xbar and R control chart use the following summary statistics

For an xbar and R control chart use the following summary statistics: x=10.0, r=2.3 and n=4 to answer the following:  1. Calculate an unbiased estimate of standard deviation.  2. Calculate the upper control limit for an xbar control chart.  3. Calculate the upper control limit for an R control chart.

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