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An automotive supplier is considering changing its
Chapter 7, Problem 7E(choose chapter or problem)
An automotive supplier is considering changing its electrical wire harness to save money. The idea is to replace a current \(20\)-gauge wire with a \(22\)-gauge wire. Since not all wires in the harness can be changed, the new wire must work with the current wire splice process. To determine whether the new wire is compatible, random samples were selected and measured with a pull test. A pull test measures the force required to pull the spliced wires apart. The minimum pull force required by the customer is \(20\) pounds. Twenty observations of the forces needed for the current wire are
28.8 24.4 30.1 25.6 26.4 23.9 22.1 22.5 27.6 28.1
20.8 27.7 24.4 25.1 24.6 26.3 28.2 22.2 26.3 24.4
Twenty observations of the forces needed for the new wire are
14.1 12.2 14.0 14.6 8.5 12.6 13.7 14.8 14.1 13.2
12.1 11.4 10.1 14.2 13.6 13.1 11.9 14.8 11.1 13.5
(a) Does the current wire meet the customer’s specifications?
(b) Find a \(90 \%\) confidence interval for the difference of the means for these two sets of wire.
(c) Construct box-and-whisker diagrams of the two sets of data on the same figure.
(d) What is your recommendation for this company?
Equation Transcription:
Text Transcription:
20
22
90%
Questions & Answers
QUESTION:
An automotive supplier is considering changing its electrical wire harness to save money. The idea is to replace a current \(20\)-gauge wire with a \(22\)-gauge wire. Since not all wires in the harness can be changed, the new wire must work with the current wire splice process. To determine whether the new wire is compatible, random samples were selected and measured with a pull test. A pull test measures the force required to pull the spliced wires apart. The minimum pull force required by the customer is \(20\) pounds. Twenty observations of the forces needed for the current wire are
28.8 24.4 30.1 25.6 26.4 23.9 22.1 22.5 27.6 28.1
20.8 27.7 24.4 25.1 24.6 26.3 28.2 22.2 26.3 24.4
Twenty observations of the forces needed for the new wire are
14.1 12.2 14.0 14.6 8.5 12.6 13.7 14.8 14.1 13.2
12.1 11.4 10.1 14.2 13.6 13.1 11.9 14.8 11.1 13.5
(a) Does the current wire meet the customer’s specifications?
(b) Find a \(90 \%\) confidence interval for the difference of the means for these two sets of wire.
(c) Construct box-and-whisker diagrams of the two sets of data on the same figure.
(d) What is your recommendation for this company?
Equation Transcription:
Text Transcription:
20
22
90%
ANSWER:
Step 1 of 6
Given:
The data for the twenty observations of the forces needed for the current wire and for the new wire is provided.