Confidence Intervals

Question

Express the confidence interval 77.8% < p < 90.2% in the form  ˆp±MoE. Here, "MoE" means "Margin of Error". Give your answers as percents, rounded to one place after the decimal.

Answer Format: ___% ± ___%

Answer 1

The point estimate, p, is halfway between the interval's endpoints.

The margin of error is half the distance between the interval's endpoints.

Does that help?