A manufacturer claims that the average tensile strength of thread A exceeds the average tensile strength of thread B by at least 13 kilograms. To test this claim, 52 pieces of each type of thread were tested under similar conditions. Type A thread had an average tensile strength of 91.3 kilograms with a standard deviation of 6.31 kilograms, while type B thread had an average tensile strength of 79.5 kilograms with a standard deviation of 4.67 kilograms. Test the manufacturer's claim using a 0.10 level of significance. Do not assume that the population variances are equal. Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. O A. Ho: H1 -H2 # 13 H1: 41 - H2 = 13 B. Ho: H1 - H2 = 13 H1: H1- 42> 13 O C. Ho: H1 - H2 < 13 H1:1-H2 = 13 O D. Ho: H1 -H2 = 13 H1: H1 - H2<13 O E. Ho: H1 - H2 = 13 H1: H1- H2#13 O F. Ho: H1 -H2 > 13 H1: H1- H2 = 13 Identify the critical region. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A. t'< O B. t'< or t'> YC. t'> 1.29 Find the test statistic. (Round to two decimal places as needed.)

A manufacturer claims that the average tensile strength of thread A exceeds the average tensile strength of thread B by at least 13 kilograms. To test this claim, 52 pieces of each type of thread were tested under similar conditions. Type A thread had an average tensile strength of 91.3 kilograms with a standard deviation of 6.31 kilograms, while type B thread had an average tensile strength of 79.5 kilograms with a standard deviation of 4.67 kilograms. Test the manufacturer's claim using a 0.10 level of significance. Do not assume that the population variances are equal. Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. O A. Ho: H1 -H2 # 13 H1: 41 - H2 = 13 B. Ho: H1 - H2 = 13 H1: H1- 42> 13 O C. Ho: H1 - H2 < 13 H1:1-H2 = 13 O D. Ho: H1 -H2 = 13 H1: H1 - H2<13 O E. Ho: H1 - H2 = 13 H1: H1- H2#13 O F. Ho: H1 -H2 > 13 H1: H1- H2 = 13 Identify the critical region. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A. t'< O B. t'< or t'> YC. t'> 1.29 Find the test statistic. (Round to two decimal places as needed.)

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Description: A manufacturer claims that the average tensile strength of thread A exceeds the average tensile strength of thread B by at least 13kilograms. To test this claim, 52 pieces of each type of thread were tested under similar conditions. Type A thread ha

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 manufacturer claims that the average tensile strength of thread A exceeds the average tensile strength of thread B by at least 13 kilograms. To test this claim, 51 pieces of each type of thread were tested under similar conditions. Type A thread had an average tensile strength of 89.8 kilograms with a standard deviation of 5.95 kilograms, while type B thread had an average tensile strength of 79.8 kilograms with a standard deviation of 5.37 kilograms. Test the manufacturer's claim using a 0.05 level of significance. Do not assume that the population variances are equal. Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. Let type A thread correspond to population 1 and let type B thread correspond to population 2. Identify the null and alternative hypotheses. Choose the correct answer below. B. Ho: H1 - H2 = 13 Ho: H1 - H2 > 13 H1: H1 - H2 = 13 A. Ho: H1 - H2 = 13 %3D H1: H1…
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Acrylic bone cement is sometimes used in hip and knee replacements to fix an artificial joint in place. The force required to break an acrylic bone cement bond was measured for six specimens under specified conditions, and the resulting mean and standard deviation were 306.03 newtons and 41.95 newtons, respectively. Assuming that it is reasonable to believe that breaking force under these conditions has a distribution that is approximately normal, estimate the mean breaking force for acrylic bone cement under the specified conditions using a 95% confidence interval. (Round your answers to three decimal places.) n USE SALT
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Acrylic bone cement is sometimes used in hip and knee replacements to fix an artificial joint in place. The force required to break an acrylic bone cement bond was measured for eight specimens under specified conditions, and the resulting mean and standard deviation were 306.11 newtons and 41.94 newtons, respectively. Assuming that it is reasonable to believe that breaking force under these conditions has a distribution that is approximately normal, estimate the mean breaking force for acrylic bone cement under the specified conditions using a 95% confidence interval. (Use a table or technology. Round your answers to three decimal places.) n USE SALT
A soft drink bottler purchases glass bottles from a vendor. The bottles are required to have an internal pressure of at least 150150 pounds per square inch (psi). A prospective bottle vendor claims that its production process yields bottles with a mean internal pressure of 157157 psi and a standard deviation of 33 psi. The bottler strikes an agreement with the vendor that permits the bottler to sample from the production process to verify the claim. the bottler randomly selects 4040 bottles from the last 1000010000 produced, measures the internal pressure of each, and finds the mean pressure for the sample to be 0.50.5 psi below the process mean cited by the vendor. (a) Assuming that the vendor is correct in his claim, what is the probability of obtaining a sample mean this far or farther below the process mean? (b) If the standard deviation were 33 psi as claimed, but the mean was 154154 psi, what is the probability of obtaining a sample mean of 156.5156.5 psi or below? (c) If the…