Inference on Proportions

Inference on Proportions - Chapter 9 & Section 15.4...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 9 & Section 15.4 Statistical Inference Procedures on Proportion(s) 9.1 Confidence Interval and sample size for one proportion 9.3 Confidence Intervals for Difference in Two Population Proportions 9.2 Hypothesis Test for one proportion 9.4 Hypothesis Test for two proportions 15. 4 Hypothesis Test for more than 2 proportions 1
Background image of page 1

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

View Full DocumentRight Arrow Icon
Proportions Sometimes we are not interested in the average number of items that are defective, but in the percent of items that are defective. In statistics, such percents are referred to as proportions. 2
Background image of page 2
3 Note on the Notation for Proportions: The obvious notational choice for proportion or probability is p . The standard convention is to use Roman letters for sample quantities and the corresponding Greek letter for population quantities. Some books do just that. However, the Greek letter π has its own special place in mathematics. Therefore, instead of using p for sample proportion and π for population proportion, many authors (especially in engineering stats texts) use p for population proportion and p with a hat (caret) on it, (called p-hat), as the sample proportion. The use of "hat" notation for differentiating between sample and population quantities is quite common.
Background image of page 3

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

View Full DocumentRight Arrow Icon
9.1 Confidence Interval for Population Proportion Population Parameter: p - population proportion having a certain characteristic Point Estimate for p: = X/n,
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/17/2011 for the course STAT 4714 at Virginia Tech.

Page1 / 23

Inference on Proportions - Chapter 9 & Section 15.4...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online