The position and elevation of a survey station are given by the random vectorx=X,inwhich X, and X2 are the planimetric coordinates, and X3 the elevation. The standard deviationsare 0.020 m, 0.045 m, and 0.025 m respectively. Correlation coefficient between X, and X2 is-0.50. There is no correlation between X, and X3, or between X2 and X3.4.1. Evaluate the covariance-variance matrix, E.4.2. Evaluate the weight matrix, W, if the reference variance chosen is 0.000625 m?.

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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 company is doing a hypothesis test on the variation in quality from two suppliers. Both distributions are normal, and the populations are independent. Use a = 0.05. A sample of 31 products were selected from Supplier 1 and a standard deviation of quality was found to be 3.77. A sample of 16 products were selected from Supplier 2 and a standard deviation of quality was found to be 3.5659. Test to see if the variance in quality for Supplier 1 is larger than Supplier 2. What are the correct hypotheses? Note this may view better in full screen mode. Select the correct symbols in the order they appear in the problem. Ho: 0.² H₁: 0.² Based on the hypotheses, compute the following: Round answers to at least 4 decimal places. The test statistic is = The p-value is = The decision is to [Fail to reject the null hypothesis The correct summary would be: There is not enough evidence to support the claim in quality for Supplier 1 is larger than Supplier 2. o that the variance
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