Question

Susie wants to determine the percentage of people in the United States that have a college degree. She conducts an email survey of 50 people by randomly selecting one person from each state. Fifteen of the people surveyed had a college degree. She then concludes that 30% of the people in the United States have a college degree.

Which of the following is the best way for Susie to get a more accurate statistic?

Answer 1

1. She should conduct the survey by phone.

2.The survey is as accurate as possible.

3.She should us a larger sample size.

4.She should select 50 people from the same state instead of different states.
im leaning towards 3

Answer 2

The third is a good bet. The others may also be good, but 3 is the best.