A Manufacturer of Windows Produces One Type That Has a Plastic

question 45

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 = $\overline { \overline { x } }$

= 50.05,and average range = 8.85.Calculate the center line for the R chart.

• A)50.05
• B)8.85
• C)2.21
• D)0.59

---

Definitions:

Maximum Temperature

The highest recorded temperature in a specified period or area.

Indicator Variable

A binary variable that takes the value of 0 or 1 to indicate the absence or presence of some categorical effect or attribute.

Logistic Regression

A statistical method used for analyzing datasets in which there are one or more independent variables that determine an outcome.

Mammography Screening

A medical test that uses X-rays to detect breast cancer in women, typically conducted as part of a preventive healthcare routine.