A manufa

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
icon
Related questions
Question
A manufacturer claims that the average tensile strength of thread A exceeds the
average tensile strength of thread B by at least 12 kilograms. To test this claim,
50 pieces of each type of thread are fested under similar conditions. Type A thread
had an average tensile strength of 86.7 kilograms with a standard deviation of
6.28 kilograms, while type B thread had an average tensile strength of 77.8
kilograms with a standard deviation of 5.61 kilograms. Test the manufacturer's
claim using a 0.05 level of significance.
Transcribed Image Text:A manufacturer claims that the average tensile strength of thread A exceeds the average tensile strength of thread B by at least 12 kilograms. To test this claim, 50 pieces of each type of thread are fested under similar conditions. Type A thread had an average tensile strength of 86.7 kilograms with a standard deviation of 6.28 kilograms, while type B thread had an average tensile strength of 77.8 kilograms with a standard deviation of 5.61 kilograms. Test the manufacturer's claim using a 0.05 level of significance.
The following data represent the running times of films produced by two different
motion-picture companies:
Time (minutes)
Company i
Company 2
102
86 98
109 92
81
165 97
134
92 87
114
Test the hypothesis that the average running time of films produced by company
2 exceeds the average running time of films produced by company 1 by 10 minutes
against the one-sided alternative that the difference is more than 10 minutes. Use
a 0.1 level of significance and assume the distributions of times to be approxi-
mately normal.
Transcribed Image Text:The following data represent the running times of films produced by two different motion-picture companies: Time (minutes) Company i Company 2 102 86 98 109 92 81 165 97 134 92 87 114 Test the hypothesis that the average running time of films produced by company 2 exceeds the average running time of films produced by company 1 by 10 minutes against the one-sided alternative that the difference is more than 10 minutes. Use a 0.1 level of significance and assume the distributions of times to be approxi- mately normal.
Expert Solution
steps

Step by step

Solved in 3 steps

Blurred answer
Recommended textbooks for you
Advanced Engineering Mathematics
Advanced Engineering Mathematics
Advanced Math
ISBN:
9780470458365
Author:
Erwin Kreyszig
Publisher:
Wiley, John & Sons, Incorporated
Numerical Methods for Engineers
Numerical Methods for Engineers
Advanced Math
ISBN:
9780073397924
Author:
Steven C. Chapra Dr., Raymond P. Canale
Publisher:
McGraw-Hill Education
Introductory Mathematics for Engineering Applicat…
Introductory Mathematics for Engineering Applicat…
Advanced Math
ISBN:
9781118141809
Author:
Nathan Klingbeil
Publisher:
WILEY
Mathematics For Machine Technology
Mathematics For Machine Technology
Advanced Math
ISBN:
9781337798310
Author:
Peterson, John.
Publisher:
Cengage Learning,
Basic Technical Mathematics
Basic Technical Mathematics
Advanced Math
ISBN:
9780134437705
Author:
Washington
Publisher:
PEARSON
Topology
Topology
Advanced Math
ISBN:
9780134689517
Author:
Munkres, James R.
Publisher:
Pearson,