In a Production Process, the Quality Control Engineer uses both X-bar chart and

Question

In a Production Process, the Quality Control Engineer uses both X-bar chart and R- chart in order to ensure the Quality of manufactured goods. When asked why the Engineer uses two measures of quality his answer was:

a)    X-bar chart measures the central tendency and R-Chart measures the Dispersion. Both of these are important for Quality control.

Two measures of Quality are unecessary-The Company can save money by using either X-Bar chart or R-Chart.

b)    X-bar chart measures the Dispersion and R-Chart measures the Central tendency. Both of these are important for Quality control.  

It's either A or B... I think it's A... please show proof or convince me your correct for best answer !!!

                            a.            X-bar chart measures the central tendency and R-Chart measures the Dispersion. X-bar chart measures the Quality and R-chart is used a double check to confirm the quality.                                  b.              

a)    X-bar chart measures the central tendency and R-Chart measures the Dispersion. Both of these are important for Quality control.

                                 c.              

Two measures of Quality are unecessary-The Company can save money by using either X-Bar chart or R-Chart.

                               d.              

b)    X-bar chart measures the Dispersion and R-Chart measures the Central tendency. Both of these are important for Quality control.  

It's either A or B... I think it's A... please show proof or convince me your correct for best answer !!!

Explanation / Answer

a) X-bar chart measures the central tendency and R-Chart measures the Dispersion. Both of these are important for Quality control.

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