(a 752 6) 1000 19. In order to estimate the proportion of personal bankruptcies that are a result of medical bills a research group took a sample of 500 bankruptcy cases and counted 258 that resulted from medical bills. A 99% confidence interval for the proportion of all personal bankruptcies that result from medical bills is about (a) .5164.044 (b) .5164.058 (c) .5164.029 (d) .5161.037 (e) 0.5161.032