Kzy Section 5.2 - QNT/275T: Statistics Xpter/5/section/2Making home > 5.2: Hypothesis test for a population meanTOT the test?hesis test for a population mean.StartXStatistical Decision Making Flash x +A factory that manufactures screws is performing a quality control experiment.Each object should have a length of no more than 12 centimeters. The factorybelieves that the length of the screws exceeds this value and measures thelength of 56 screws. The sample mean screw length was 11.91 centimeters.The population standard deviation is known to be o = 0.18 centimeters.What is the null hypothesis? SelectWhat is the alternative hypothesis? Select

claim : μ≤12n = 56x¯ = 11.91σ = 0.18

Answered: A factory that manufactures screws is…

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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Many cheeses are produced in the shape of a wheel. Because of the differences in consistency between these different types of cheese, the amount of cheese, measured by weight, varies from wheel to wheel. Heidi Cembert wishes to determine whether there is a significant difference, at the 10% level, between the weight per wheel of Gouda and Brie cheese. She randomly samples 18 wheels of Gouda and finds the mean is 1.3 lb with a standard deviation of 0.3 lb; she then randomly samples 10 wheels of Brie and finds a mean of 0.95 lb and a standard deviation of 0.21 lb. What is the df and p-value for Heidi's hypothesis of equality? Assume normality. (Give your answer correct to four decimal places.)
How do I find the Standard Deviation and Sample Mean?
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