Question

Out of 200 people sampled, 120 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids.

Give your answers as decimals, to four places

_____ < p < ______

Answer 1

The statistical software output for this problem is :

One sample proportion summary confidence interval: p: Proportion of successes Method: Standard-Wald 99% confidence interval results: Proportion Count Total Sample Prop. Std. Err. L. Limit U. Limit 120 200 0.6 0.034641016 0.51077066 0.68922934 P

A 99% confidence interval for the true population proportion of people with kids is :

0.5108 < p < 0.6892