A Quality Control Chart Is Used to Monitor the Customer

question 52

Multiple Choice

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. Over the last hundred sample means, one sample mean was outside a control limit. The chart shows:

• A) chance variation.
• B) standard variation.
• C) assignable variation.
• D) total variation.

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