According to a Gallup Poll conducted in March of 2009, 38% of American adults polled believe that global warming will pose a serious threat to them or their way of life in their lifetime. Assuming a sample size of 1000, calculate a 95% confidence interval for estimating the population proportion of all American adults who believe that global warming will pose a serious threat to them or their way of life in their lifetime.

Question

According to a Gallup Poll conducted in March of 2009, 38% of American adults polled believe that global warming will pose a serious threat to them or their way of life in their lifetime.  Assuming a sample size of 1000, calculate a 95% confidence interval for estimating the population proportion of all American adults who believe that global warming will pose a serious threat to them or their way of life in their lifetime.