The Weights of Aluminum Castings Produced by a Process Are

question 30

Multiple Choice

The weights of aluminum castings produced by a process are normally distributed. A random sample of 5 castings is selected; the sample mean weight is 2.21 pounds; and the sample standard deviation is 0.12 pound. The 98% confidence interval for the population mean casting weight is _________.

• A) 1.76 to 2.66
• B) 2.00 to 2.41
• C) 2.08 to 2.34
• D) 1.93 to 2.49
• E) 2.49 to 2.67

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Definitions:

Graphical Language

A visual programming language where the user creates programs by manipulating graphical elements rather than writing textual code.

Function Block Diagram

A graphical programming language used in PLCs and other control systems, representing functions between input and output.

Ladder Diagram

A graphical representation of a program used in PLC (Programmable Logic Controller) programming, resembling the rungs of a ladder, where each rung represents a unique logic operation.

Sequential Function Chart

A graphical programming language used in PLC programming, representing the sequence of operations or steps in a process.