Inference for a proportion

Lecture 17

Dr. Mine Çetinkaya-Rundel

Duke University
STA 101 - Fall 2023

Warm up

Announcements

• Lab 7 due Thu, Nov 9 at 5pm
• Exam 2 coming up:
  • Fri, Nov 10: Exam 2 review in lab
  • Wed, Nov 15: Exam 2 in-class
  • Wed, Nov 15 - Fri, Nov 17: Exam 2 take-home, due at 5 on Fri, Nov 17

Project 2

• Teams to be announced soon
• Poll based on multiple requests I’ve received so far (presumably more to come…)

Inference for two proportions

NC poll on equality

A September 16-19, 2023, asked North Carolina voters, among other issues, about issues of equality and women’s progress. Specifically, one of the questions asked:

Which of these two statements come closest to your own views—even if neither is exactly right?

• The country has made most of the changes needed to give women equal rights with men.

• The country needs to continue to make changes to give women equal rights to men.

Let’s hear from you

STA 101 vs. NC

Vote on Canvas under 2023-11-06 Check-in with the access code equality.

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How do you think the distribution of responses from this class compares to the NC polling results?

a. Similar distribution of answers between the two polls.

b. Higher percentage of “The country has made most of the changes needed to give women equal rights with men” in STA 101 compared to NC poll.

c. Lower percentage of “The country has made most of the changes needed to give women equal rights with men” in STA 101 compared to NC poll.

Application exercise

Go to Posit Cloud and continue the project titled ae-13-Equality.