A random sample of 1,000 retirees found that 28% participate in activities at their local senior center. Find a 95% confidence interval for the proportion of seniors who participate in activities at their local senior center.

[list=1][br][*]Determine the given information. [br][/*][*]Determine the confidence interval. [br][/*][/list][br]This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit [url=http://www.walch.com/]www.walch.com[/url] for more information.