A recent survey asked, “If the residents of an area don’t vote in favor of an eatery, is it right that it should not be opened in that area?†Of 458 respondents, 355 said yes and 103 said no. Show that a 99% confidence interval for the population proportion who would say yes is (0.725, 0.825). Interpret.
When a 2016 research study asked whether there is solid evidence of global warming, 87% of liberals said yes whereas 25% of conservatives said yes. For conservatives, if , find and interpret a
(a) 95% and
(b) 99% confidence interval for a relevant parameter.