Question: To prepare a report on the economy analysts need to

To prepare a report on the economy, analysts need to estimate the percentage of businesses that plan to hire additional employees in the next 60 days.
(a) How many randomly selected employers must you contact in order to guarantee a margin of error of no more than 4%?
(b) If analysts believe that at most 20% of firms are likely to be hiring, how many must they survey to obtain a margin of error 0.04?

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