A researcher is estimating the population proportion of people in the United States who delayed seeking medical care during the last 12 months due to costs. The estimate must be accurate within 2% of the population with 90%confidence. Find the minimum sample size needed when: a)no preliminary estimate is available b) a previous survey found that 6.3% of people in the USA delayed seeking care during the last 12 months due to costs

Will give brainliest plz hurry lexie surveyed 4 teenagers to find out approximately how many hours, per week, they read for fun, and how many siblings they have. brooke said she reads about 10 h a week for fun, and that she has 5 siblings. celia said she has 1 brother and 1 sister and reads for fun about 3 h each week. henry said he has 2 brothers and reads for fun about 30 min each week. jude said he doesn't read for fun and has 3 brothers and 3 sisters. use this information to complete the data table. express your answers as whole numbers or decimals. name hours of fun number of siblings brooke celia __ henry jude