1.Express the confidence interval 73.5%4.1% in interval form. Express the answer in decimal format (do not enter as percents).

2.We wish to estimate what percent of adult residents in a certain county are parents. Out of 300 adult residents sampled, 150 had kids. Based on this, construct a 95% confidence interval for the proportion, p, of adult residents who are parents in this county. Give your answers as decimals, to three places. < p <

3.Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E. that corresponds to a sample of size 287 with 42.2% successes at a confidence level of 80%. M.E. = % Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Round final answer to one decimal place

4,A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 2% margin of error at a 90% confidence level, what size of sample is needed? Give your answer in whole people.