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Name: A pipes manufacturer makes pipes with a length that is supposed to be
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Description: A pipes manufacturer makes pipes with a length that is supposed to be 12 inches. A quality control technician sampled 35 pipes and found that the sample mean length was 12.05 inches and the sample standard deviation was 0.13 inches. The technician cl

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A pipes manufacturer makes pipes with a length that is supposed to be 12 inches. A quality control technician sampled 35 pipes and found that the sample mean length was 12.05 inches and the sample standard deviation was 0.13 inches. The technician claims that the mean pipe length is not 12 inches.

What type of hypothesis test should be performed?

Two-tailed t-test

Two-tailed z-test

Left tailed t-test

Left tailed z-test

What is the test statistic?

What is the number of degrees of freedom?

Does sufficient evidence exist at the α=0.01 significance level to support the technician's claim? Yes or No

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