A copper smelting process is supposed to reduce the arsenic content of the copper to less than 1000 ppm. Let u denote the mean arsenic content for copper treated by this process, and assume that the...

Extracted text: A copper smelting process is supposed to reduce the arsenic content of the copper to less than 1000 ppm. Let u denote the mean arsenic content for copper treated by this process, and assume that the standard deviation of arsenic content is o = 100 ppm. The sample mean arsenic content x of 75 copper specimens will be computed, and the null hypothesis Ho : 2 1000 will be tested against the alternate H1 : µ < 1000.="" a="" decision="" is="" made="" to="" reject="" ho="" if="" x="">< 980.="" find="" the="" level="" of="" this="" test.="" a.="" b.="" find="" the="" power="" of="" the="" test="" in="" part="" (a)="" if="" the="" true="" mean="" content="" is="" 965="" ppm.="" for="" what="" values="" of="" x="" should="" h,="" be="" rejected="" so="" that="" the="" power="" of="" the="" test="" will="" be="" 0.95="" c.="" when="" the="" true="" mean="" content="" is="" 965?="" d.="" for="" what="" values="" of="" x="" should="" ho="" be="" rejected="" so="" that="" the="" level="" of="" the="" test="" will="" be="" 5%?="" e.="" what="" is="" the="" power="" of="" a="" 5%="" level="" test="" if="" the="" true="" mean="" content="" is="" 965="" ppm?="" f.="" how="" large="" a="" sample="" is="" needed="" so="" that="" a="" 5%="" level="" test="" has="" power="" 0.95="" when="" the="" true="" mean="" content="" is="" 965="">