1. A public opinion poll in Ohio wanted to determine whether registered voters in the state approve of a measure to ban smoking in all public areas. They selected a simple random sample of 50 registered voters from each county in the state and ask whether they approve or disapprove of the measure.The proportion of registered voters in the state who approved of banning smoking in public areas is an example of _________.

a. a statistic

b. a parameter

c. a sample proportion

d. an unbiased statistic

2) Hoping to attract more shoppers, a city is planning to build a new public parking garage downtown. The city plans to pay for the structure through parking fees. The consultant, who is advising the city on this project, has selected a simple random sample of 44 weekdays and calculated the average amount in fees collected from neighboring parking structures. The sample mean was $967. Which of the following scenarios would lead to the smallest margin of error?

a. Sample fewer days, so that the sample mean may be lower than $967 and the margin of error will be smaller as well.

b. Sample fewer daysa smaller sample size will automatically lead to a smaller margin of error.

c. Stay with a sample size of 44 daysthis sample size was used for a reason, which was most likely to reduce the margin of error.

d. Sample more dayswith more days we have more data and our estimate is expected to be more accurate, leading to a smaller margin of error.