A simple random sample consists of 65 lengths of piano wire that were tested for the

Chapter 6, Problem 2

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A simple random sample consists of 65 lengths of piano wire that were tested for the amount of extension under a load of \(30 \mathrm{~N}\). The average extension for the 65 lines was \(1.102 \mathrm{~mm}\) and the standard deviation was \(0.020 \mathrm{~mm}\). Let \(\mu\) represent the mean extension for all specimens of this type of piano wire.

a. Find the P-value for testing \(H_{0}: \mu \leq 1.1 \text { versus } H_{1}: \mu>1.1\).

 

b. Either the mean extension for this type of wire is greater than \(1.1 \mathrm{~mm}\), or the sample is in the most extreme % of its distribution.

Equation Transcription:

     

   

   

   

       

Text Transcription:

30 N

1.102 mm

0.020 mm

\mu

H_{0}: \mu \leq 1.1 \text { versus } H_{1}: \mu>1.1

1.1 mm

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