a. You are doing a survey of beer prices during spring break at Daytona Beach. Last year the average price per six-pack for premium beer was $5.00 with a standard deviation of $0.50. Your survey requires a 95% confidence level with an acceptable error of $0.10 per six-pack. Calculate the required sample size.
b. A market research analyst at Disney World knows that 60 percent of the guests like roller coaster rides. S/he wishes to have an error of no more than 2 percent and to be 90 percent confident about attitudes toward a new roller coaster ride. What sample size is required?