A new coin machine printing nickels is being tested by the Mint. Ten
samples, with each using 10 nickels, are weighed. Each nickel should weigh 5 g and each sample should weigh 50g. The data collected is shown in the chart below:
A) Determine the upper and lower control limits and the overall mean for the x bar chart and the R chart.
B) Draw the charts and plot the values of the sample means and range.
C) Should the mint invest in this new machine? Explain
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