Out of 400 people sampled, 284 had kids. Use the Theory-Based Inference applet to find a 95% confidence interval for the true population proportion of people with kids,

(a) We are 95% confident that the percentage of all people who have kids is between 66.6 t% and 75.5 %

(b) The sample statistic is.... Give your answer as a decimal (NOT a percentage), and do not round.

(c) The margin of error is ....... Give your answer as a decimal using your answers from parts (a) and (b).

(d) The confidence interval from part (c) can be written as ....... +- .......