To determine whether the pipe welds in a nuclear power plant meet specifications, a random sample of welds is selected and tests are conducted on each weld in the sample. Weld strength is measured as the force required to break the weld. Suppose that the specifications state that the mean strength of welds should exceed 100 lb/in2. The inspection team decides to test H0: µ = 100 versus Ha: µ > 100. Explain why this alternative hypothesis was chosen rather than µ <100.
Answer to relevant QuestionsThe paper “Debt Literacy, Financial Experiences and Over-Indebtedness” (Social Science Research Network, Working paper W14808, 2008) included analysis of data from a national sample of 1000 Americans. One question on the ...The article “Irritated by Spam? Get Ready for Spit” (USA Today, November 10, 2004) predicts that “spit,” spam that is delivered via Internet phone lines and cell phones, will be a growing problem as more people turn ...The article “Fewer Parolees Land Back Behind Bars” (Associated Press, April 11, 2006) includes the fol- lowing statement: “Just over 38% of all felons who were released from prison in 2003 landed back behind bars by ...The report “Highest Paying Jobs for 2009–10 Bachelor’s Degree Graduates” (National Association of Colleges and Employers, February 2010) states that the mean yearly salary offer for students graduating with a degree ...Many consumers pay careful attention to stated nutritional contents on packaged foods when making purchases. It is therefore important that the information on packages be accurate. A random sample of n = 12 frozen dinners of ...
Post your question