Researchers have postulated that, due to differences in diet, Japanese * 1 p children have a lower proportion of children with high blood cholesterol levels than U.S. children. Suppose that the proportion of high blood cholesterol level of U.S. children is known to be 0.78. Ho: p = .78 Ho: p = .78 Ha: p> .78 Ha: p<.78 o ho: p=".78" ha: z.78>