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A researcher studying public opinion of proposed Social Security changes obtains a simple random sample...

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A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of 50 adult Americans and asks them whether or not theysupport the proposed changes. To say that the distribution of the sample proportion of adults who respond yes, is approximately normal, how many more adultAmericans does the researcher need to sample in the following cases?(a) 15% of all adult Americans support the changes(b) 20% of all adult Americans support the changes (a) The researcher must ask___more American adults. (Round up to the nearest integer.)

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