Data Analysis and Statistics

Question

Pew Research is a nonpartisan American think tank that provides information on social issues, public opinion, and demographic trends. You have been hired by Pew Research to create and administer a survey about who voters in Arizona would like to vote for in the upcoming presidential election. You have been given the email address and phone number of adults registered to vote in Arizona.



a.  Describe two sampling methods you could use to obtain an unbiased view of the opinion of Arizona voters.

b. Describe a challenge you may face while trying to get an unbiased view of the opinion of Arizona voters.

c. How many people would you need to survey to get a margin of error of ±5%?

d. You are training an assistant, but they keep writing biased questions! Write one biased question and explain why it is biased and one unbiased question.

Answer 1

See the video to get the answer to these questions. There's a lot of useful information and perspective that would be easy to miss in written form.