Quality Control Charts Usually Have a Central Line and Upper

question 61

Multiple Choice

Quality control charts usually have a central line and upper and lower control limit lines.Which of the following are reasons that the process being monitored with the chart should be investigated?

• A)A single plot falls above or below the control limits
• B)Normal behavior
• C)A large number of plots are on or near the central line
• D)No real trend in any direction
• E)A change in raw materials or operators

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Definitions:

Alternative Hypothesis

A statement that contradicts the null hypothesis and proposes there is indeed a significant effect or relationship between variables.

Sample Sizes

The number of observations or subjects included in a study from which conclusions are drawn.

Test Statistic

A calculated value from sample data, used in statistical hypothesis testing to determine whether to reject the null hypothesis.

Random Samples

A subset of individuals chosen from a larger set, where each individual has an equal chance of being selected.