Let type A thread correspond to population 1 and let type B thread correspond to population 2. Identify the null andalternative hypotheses. Choose the correct answer below.O A. Ho H4- H2# 14H1 H1 - H2 = 14OD. Ho H-H2> 14H, H - 12 = 14B. Ho H - 42 = 14OC. Ho H1 -42 = 14H -2 14OF. H H1-H2 = 14H -12 > 14OE Ho H-H2 14H, -2=14Identify 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)XA. I'< or t'>B. t'> 1.66Oc. t'<Find the test statistic2.73 (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 atleast 11 kilograms. To test this claim, 48 pieces of each type of thread were tested under similar conditions. Type A threadhad an average tensile strength of 83.4 kilograms with a standard deviation of 6.11 kilograms, while type B thread had anaverage tensile strength of 75.4 kilograms with a standard deviation of 5.84 kilograms. Test the manufacturer's claim using a0.05 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

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Answered: A manufacturer claims that the average…

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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An engineer working for a tire manufacturer investigates the average life of a new material to be used in the manufacturing process. For this purpose, he builds a sample of 13 tires and tests them in a laboratory until the end of their useful life is reached. The data obtained from the sample are as follows: average of 60897.9 km and standard deviation of 2734.8 km. The engineer would like to demonstrate that the average service life of the tire with the new material exceeds 60,000 km. a) State the null and alternative hypothesis to be stated in this experiment. Test the stated hypotheses using an α = 0.05 What conclusions are reached? b) Find a 95% confidence interval for the average tire life with the new material. Interpret your answer. (RESPOND MANUALLY) (RESPOND MANUALLY)
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