Quality Control Engineers Create Acceptable Boundaries for Variability Within the Processes

question 27

Multiple Choice

Quality control engineers create acceptable boundaries for variability within the processes they monitor.They determine that the acceptable boundary for a certain heat exchange process at a gasoline refinery must be set such that under normal operating conditions the threshold would be exceeded only 1% of the time.Under normal operating conditions, the process varies according to a normal distribution, with mean temperature of 231°C and standard deviation of 2.5°C.What upper temperature should they set so that the process will normally exceed the temperature 0.51% of the time?

• A) 257.00°C
• B) 237.68°C
• C) 224.58°C
• D) 237.43°C

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