The piston diameter of a certain hand pump is 0.8 inch. The manager determines that the diameters are normally distributed, with a mean of 0.8 inch and a standard deviation of 0.006 inch. After recalibrating the production machine, the manager randomly selects 21 pistons and deterrmines that the standard deviation is 0.0042 inch. Is there significant evidence for the manager to conclude that the standard deviation has decreased at the a= 0.05 level of significance? What are the correct hypotheses for this test? The null hypothesis is H: The alternative hypothesis is H, Use the chi-square table to find the critical value, (Round to three decimal places as needed.) Calculate the value of the test statistic. x2 = (Round to three decimal places as needed.) What is the correct conclusion at the a= 0.05 level of significance? V the null hypothesis. There V sufficient evidence to conclude that the standard deviation has decreased at the 0.05 level of significance.

The piston diameter of a certain hand pump is 0.8 inch. The manager determines that the diameters are normally distributed, with a mean of 0.8 inch and a standard deviation of 0.006 inch. After recalibrating the production machine, the manager randomly selects 21 pistons and deterrmines that the standard deviation is 0.0042 inch. Is there significant evidence for the manager to conclude that the standard deviation has decreased at the a= 0.05 level of significance? What are the correct hypotheses for this test? The null hypothesis is H: The alternative hypothesis is H, Use the chi-square table to find the critical value, (Round to three decimal places as needed.) Calculate the value of the test statistic. x2 = (Round to three decimal places as needed.) What is the correct conclusion at the a= 0.05 level of significance? V the null hypothesis. There V sufficient evidence to conclude that the standard deviation has decreased at the 0.05 level of significance.

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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