Wire electrical-discharge machining (WEDM) is a process used to manufacture conductive hard metal components. It uses a continuously moving wire that serves as an electrode. Coating on the wire electrode allows for cooling of the wire electrode core and provides an improved cutting performance. An article gave the following sample observations on total coating layer thickness (in µm) of eight wire electrodes used for WEDM. 22 17 29 35 42 24 25 25 Calculate a 99% CI for the standard deviation of the coating layer thickness distribution. (Round your answers to two decimal places.) ( ____ , ____ )

Wire electrical-discharge machining (WEDM) is a process used to manufacture conductive hard metal components. It uses a continuously moving wire that serves as an electrode. Coating on the wire electrode allows for cooling of the wire electrode core and provides an improved cutting performance. An article gave the following sample observations on total coating layer thickness (in µm) of eight wire electrodes used for WEDM. 22 17 29 35 42 24 25 25 Calculate a 99% CI for the standard deviation of the coating layer thickness distribution. (Round your answers to two decimal places.) ( , )

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Interpret effect size t(30)=1.12, p=.34, n2=.001 small, medium, or large
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Electrical discharge machining (WEDM) is a process used to manufacture conductive components from hard metals. It uses a continuously moving wire that serves as an electrode. The wire electrode coating allows the core of the wire electrode to cool and provides improved cutting performance. The article “High-Performance Wire Electrodes for Wire Electrical-Discharge Machining: A Review” (J. of Engr. Manuf., 2012: 1757-1773) mentions the following observations on the total thickness of the electrode coverage (in µm) of eight electrodes used for WEDM:(need the process can be by hand ,Excel or R.) 21 16 29 35 42 24 24 25 a. Calculate the 99% confidence interval for the mean of the electrode coverage thickness distribution. Assume Normality. b. If previous years the average thickness of the electrode cover was 24 µm. Can it be said, based on the evidence from the sample, that it has already changed significantly? Explain…
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