A random sample of 487 nonsmoking women of normal weight (body mass index between 19.8 and 26.0) who had given birth at a large metropolitan medical center was selected (“The Effects of Cigarette Smoking and Gestational Weight Change on Birth Outcomes in Obese and NormalWeight Women,” Amer. J. of Public Health, 1997: 591–596).

It was determined that 7.2% of these births resulted in children of low birth weight (less than 2500 g). Calculate an upper confidence bound using a confidence level of 99%

for the proportion of all such births that result in children of low birth weight.