2, A poll found that 38% rand believe in ghosts.(ch 16), of a random sample of 1

Question

2, A poll found that 38% rand believe in ghosts.(ch 16), of a random sample of 1012 American adults said that they Find the margin of error for this poll if we want 90% confidence in our estimate of American adults who believe in ghosts. b. Find the "90% confidence interval" for the true mean proportion of American adult sand interpret it. the margin of error be larger or C. If we want to be 99% confident will smaller? Find that margin of error. ler margins of error involve greater or less confidence eneral, will smal d. In g in the interval?

Explanation / Answer

d) margin of errror = Z * / sqrt(n)

So the smaller is the margin of error, the confidence level will also be smaller

So,smaller margins of error involve less confidence in the interval

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