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We wish to estimate what percent of adult residents in a certain county are parents. Out of 200 adult residents sampled, 90 had kids. Based on this, construct a 99% confidence interval for the proportion, p, of adult residents who are parents in this county. Give your answers as decimals, to three places. <p<
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 124 with 20.2% successes at a confidence level of 99.5%. 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
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 1% margin of error at a 99% confidence level, what size of sample is needed? Give your answer in whole people.