Fast Food! Even though we know it may not be good for us, many Americans really enjo...

Fast Food! Even though we know it may not be good for us, many Americans really enjoy their fast food! A survey conducted by Pew Research Center19 graphically illustrated our penchant for eating out, and in particular, eating fast food:

a. This survey was based on “telephone interviews conducted with a nationally representative sample of 2250 adults, ages 18 years and older, living in continental U.S. telephone households.” What problems might arise with this type of sampling?

b. How accurate do you expect the percentages given in the survey to be in estimating the actual population percentages? (HINT: Find the margin of error.)

c. If you want to decrease your margin of error to be ±1%, how large a sample should you take?