Question: The production quantity on an assembly line is monitored using control charts for mean and standard deviation. According to the following table, which control charts

The production quantity on an assembly line is

The production quantity on an assembly line is monitored using control charts for mean and standard deviation. According to the following table, which control charts are appropriate for these data. The table contains the successive count of production quantity at this factory in 20 sample Sample Sample Number of products 6 Number of products 2 1 11 2 8 12 8 3 3 13 7 4 9 14 7 5 8 15 7 6 3 16 3 7 9 17 10 8 5 18 4 9 3 19 4 10 8 20 9 Find Lower Control Limit (LCL) for the appropriate control chart for the standard deviation. Select one: O a. 0.998 0 b. 4.735 O c. 12.208 O d. 8.471 o e. 0.000

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