Use the Information Below to Answer the Following Question(s)

question 68

Multiple Choice

Use the information below to answer the following question(s) .Use the "Factors for Control Limits" Table A.3 from the textbook where required:
A control chart needs to be developed to determine if the temperature for a process is within control limits.Five samples each having 4 observations are taken and the sample measurements (temperature in degrees F) are noted in the table below:

-What is the UCL for a X-bar chart?

• A)253.218
• B)247.852
• C)250
• D)252.527

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Definitions:

Mean

The arithmetic average of a set of values, calculated as the total of all values divided by the number of values.

Standard Normal

A type of normal distribution with a mean of 0 and a standard deviation of 1.

Area

In mathematics, the extent of a two-dimensional surface within a boundary, measured in square units.

Probability Density

A function that describes the relative likelihood for a continuous random variable to occur at a specific point.