The National Prenatal Statistics Unit of the Sydney Children…
The National Prenatal Statistics Unit of the Sydney Children’s Hospital reports that the mean birth weight of all babies born in Australia in 2011 was 7.48 pounds. A Florida hospital reports that the average weight of 118 babies born there last year was 7.52 pounds, with a standard deviation of 1.31 pounds. If we believe that Florida babies fairly represent American newborns, is there evidence that U.S. babies and Australian babies do not weigh the same amount at birth? Write the appropriate alternative hypotheses for the test.