Because of high test costs,a sample of single wastewater sludge is tested daily for dissolved oxygen content.The appropriate control chart is:
A) $ \bar{x} $-chart and R-chart.
B)u-chart.
C)x-chart and moving range chart.
D)x-chart and R-chart.

Question

Quizplus · Accepted Answer

The x-chart and moving range chart are appropriate for monitoring the dissolved oxygen content in a single wastewater sludge sample tested daily. This is because the x-chart is used for individual measurements rather than averages, and the moving range chart helps monitor the variability between individual measurements, which is suitable for situations where samples are taken individually over time.

Because of High Test Costs,a Sample of Single Wastewater Sludge xˉ \bar{x} xˉ

Because of High Test Costs,a Sample of Single Wastewater Sludge $\bar{x}$