In preparing a report on the economy, we 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 we contact in order to create an estimate in which we are 95% confident with a margin of error of 9%? b) Suppose we want to reduce the margin of error to 3%. What sample size will suffice? c) Why might it not be worth the effort to try to get an interval with a margin of error of 1%? a) A sample size of is needed. (Round up to the nearest whole number.) b) A sample size of |is needed. (Round up to the nearest whole number.) c) Choose the correct answer below. A. It is not possible to get a margin of error that small without measuring the whole population. O B. When the sum of the confidence level and the margin of error is less than or equal to 100%, the actual confidence level is reduced. O C. With a very small margin of error, the sample may not be representative of the population. O D. The sample size becomes very large, and it is probably not worth the effort. O E. It is worth the effort because reducing the margin of error is always useful