The January 2007 Consumer Reports study found that 15% of 525 broiler chickens tested were infected with the Salmonella.
(a) Determine the margins of error for report if we want 90% confidence in our estimate of proportion of infected chickens.
(b) Develop a 90% confidence interval.
(c) Discuss what your confidence interval says regarding chicken sold in the US.
(d) If we want to be 95% confident, will the margin of error increase?