than 300 pamengen tewhted in an trease cating of 85.35 , and a sumele of 43 whips that carry so0 or more passergers provided an average rating of 81.80 . Assume that the population standard devation is 4.55 for shios tost carry frwer then 500 paskengers and 396 for shies thac carry boo or more passengers tound yeur all anisweis to two decimal paceh. W. What is the point eutmote of the diflerence between the population mean ratisg far ships that carry feee than 500 pasiengers and the population mean rating for ships that carry soo or more gaicengere? b. M 05W coikdence, what a the margin of error? to.