Cher studying public opinion of proposed Social Security changes obtains a si ample of 50 adult Americans and asks them whether or not they support the To say that the distribution of the sample proportion of adults who respond y ately normal, how many more adult Americans does the researcher need to s ing cases? of all adult Americans support the changes of all adult Americans support the changes esearcher must ask esearcher must ask more American adults. (Round up to the nearest integ more American adults. (Round up to the nearest integ