HW: 8.3 Confidence Intervals for a Population... Question 9 of 10 (1 point) | Question Attempt: 1 of 3 T Call me: A sociologist wants to construct a 99.8% confidence interval for the proportion of children aged 8-10 living in New York who own a smartphone. Part: 0 / 3 Part 1 of 3 (a) A survey by the National Consumers League estimated the nationwide proportion to be 0.34. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.04? A sample of children aged 8-10 living in New York is needed to obtain a 99.8% confidence interval with a X 5 margin of error of 0.04 using the estimate 0.34 for p