What would the confidence interval for the true percentage of adults be in this problem?

June 7, 2019 Off By admin

Use the given degree of confidence and sample data to construct a confidence interval for the population proportion.

Of 140 adults selected randomly from a town, 35 of them smoke. Construct a 99% confidence interval for the true percentage of all adults in the town that smoke.

I keep getting a negative answer for the lower limit so I don’t think I am doing it correctly.