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Name: The developer of a new welding rod claims that spot welds using his pr
Uploaded: 2024-03-20T07:07:12.000Z
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Description: The developer of a new welding rod claims that spot welds using his product will have greater strength than conventional welds. For 33 welds using the new rod, the tensile strength is 23540 pounds per square inch, with a standard deviation of 600 pou

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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The developer of a new welding rod claims that spot welds using his product will have greater strength than conventional welds. For 33 welds using the new rod, the tensile strength is 23540 pounds per square inch, with a standard deviation of 600 pounds. For 37 conventional welds on the same materials, the average tensile strength is 23100 pounds per square inch, with a standard deviation of 750 pounds. Assuming normally distributed populations with equal standard deviations, use the 0.05 level of significance in testing the claim of the superiority of the new rod. Based on the calculated and critical values, is the null hypothesis rejected?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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