You plan to find a confidence interval for the percentage of children who have speech delays. A small pilot study finds that 6% of children have speech delays. If you want a 90% confidence interval...

You plan to find a confidence interval for the percentage of children who have speech delays.

A small pilot study finds that 6% of children have speech delays. If you want a 90% confidence interval with a margin of error of 3%, what is the minimum sample size you must take?