Continued where the bottom chart cutoff: n=4, A2=0.73, D3=0.00, D4=2.28

A machine fills boxes with cereal. The labeled weight is 9 oz. The quality control department sampled three boxes every day for four days. The samples are as follows (You may download the table from the following Excel file to facilitate calculation X R Charts Data 4.xIsx ): Sample Box Weights 9.31 9.13 8.77 8.55 9.04 8.66 9.03 9.46 3 8.79 9.3 8.5 8.77 The X double bar of samples is . The R bar of the samples is . The lower control limit (LCL) of X bar chart is (refer to the table below if necessary) . The upper control limit (UCL) of R bar chart is (refer to the table below if necessary) (Keep two decimal points if applicable. Do not round your numbers in Excel till all the calculation is done. Then do rounding when entering answers into the blanks.) Factor for R Chart Factor Number of for x- Lower Upper Observations bar Control Control in Subgroup Chart Limit Limit A2 D3 DA N 1.88 0.00 3.27 3 1.02 0.00 2.57 esc