A Manufacturer of Windows Produces One Type That Has a Plastic

question 6

Multiple Choice

A manufacturer of windows produces one type that has a plastic coating.The specification limits for the plastic coating are 30 and 70.From time to time the plastic coating can become uneven.Therefore,in order to keep the coating as even as possible,thickness measurements are periodically taken at four different locations on the window.15 subgroups were observed,each consisting of four thickness measurements,with the following results: mean of the means = = 50.05,and average range = 8.85.Calculate the center line for the X-bar chart.

• A)50.05
• B)8.85
• C)4.12
• D)3.34

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Recurring Appointment

An appointment that repeats at regular intervals over a set period of time.

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Periods of time or ranges in value, often referenced in scheduling, statistical analysis, or musical notation.

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