1)Express the confidence interval 38.4%5.8%38.4%5.8% 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 400 adult residents sampled, 336 had kids. Based on this, construct a 90% 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 162 with 24.1% successes at a confidence level of 99.8%.

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)