{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Ch. 19 part 1

# Ch. 19 part 1 - STAT 2053 Elementary Statistics Chapter 19...

This preview shows pages 1–7. Sign up to view the full content.

STAT 2053 – Elementary Statistics Chapter 19 – Inference about a Population Proportion

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Chapter 19 - Proportions Until now, we had been working with population means. Chapters 19 and 20 focus on inferences about populations proportions (The percent of our whole population that has a specific quality). Statistics about proportions are everywhere: 50% of all marriages end in divorce. 73% of teams who win Game 1 win a best-of- 7 series. Two-thirds of all statistics are made up on the 2 Chapter 19
Proportions We are interested in the unknown proportion of a population that has some outcome (think of this outcome as a “success”). We’re going to call the proportion p . The statistic that estimates the population proportion is called the sample proportion . (Called p-hat) 3 ˆ p = numberofsuccessesinthesample totalnumberofindividualsinthesample Chapter 19

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Chapter 19 4 Inference about a Proportion Simple Conditions
Chapter 19 5 Inference about a Proportion Sampling Distribution

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Proportions Example : Suppose OSU randomly sampled 127 college students, of whom 107 said that they prayed at least once in a while.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern