Macmillan LearningSTATE: How heavy a load (in pounds) is needed to pull apart pieces of Douglas fir 4 inches long and 1.5 inches square? Datafrom students doing a laboratory exercise are given.Weight of Load (lbs)33,19031,86032,59026,52033,28032,32033,02032,03030,46032,70023,04030,93032,72033,65032,34024,05030,17031,30028,73031,920To access the data, click the link for your preferred software format.CSV Excel (xls) Excel (xlsx) JMP Mac-Text Minitab14-18 Minitab 18+ PC-Text R SPSS TI CrunchIt!PLAN: We will estimate μ by giving a 98% confidence interval.SOLVE: Give a 98% confidence interval for the mean load required to pull apart the wood. Suppose that the strength of piecesof wood like these follows a Normal distribution with standard deviation 3000 pounds. Give your answers to twodecimal places.lower bound:28439.71Incorrectupper bound:31560.29Incorrect

We will construct a z-interval since the population standard deviation (σ) is known.σ = 3000 pounds…

Answered: Macmillan Learning STATE: How heavy a…

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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Pulling Apart Wood. How heavy a load (in pounds) is 4step needed to pull apart pieces of Douglas fir 4 inches long and 1.5 inches square? Here are data from students doing a laboratory exercise: 33,190 31,860 32,590 26,520 33,280 32,320 33,020 32,030 30,460 32,700 23,040 30,930 32,720 33,650 32.340 24,050 30,170 31,300 28,730 31,920 We are willing to regard the wood pieces prepared for the lab session as an SRS of all similar pieces of Douglas fir. Engineers also commonly assume that characteristics of materials vary Normally. Suppose that the strength of pieces of wood like these follows a Normal distribution, with standard deviation 3000 pounds. Is there statistically significant evidence at thea = 0.10 level against the hypothesis that the meanis 32,500 pounds for the two-sided alternative? Is there statistically significant evidence at thea = 0.10 level against the hypothesis that the meanis 31,500 pounds for the two-sided alternative?

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