Bus 578 Business Statistics

A complete assignment covering statistical methods and business analytics.

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1Assignment 3Business StatisticsBus 578Spring-2014Ahmed HossainCWID: 50116869Date: 4/6/2014Assignment-3(Chs.9,10and12)Due by Midnight of Sunday,April 6th, 2014: Total75 pointsTrue/False(Onepoint each)Chapter 91.Themanager of the quality department for a tire manufacturing company wants to know theaverage tensile strength of rubber used in making a certain brand of radial tire. The population isnormally distributed and the population standard deviation is known. She uses a Z test to test thenull hypothesis that the mean tensile strength is 800 pounds per square inch. The calculated Ztest statistic is a positive value that leads to a p-value of .009for the test. If the significance level()is .01, the nullhypothesis would be rejected.True2.You cannot make a TypeIIerror when the null hypothesis is true.True

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